*Hello and welcome to ***exampundit**. So here is a set of SBI PO Prelims Quantitative Aptitude Quiz 2017.

1. A milkman adds 500 ml of water to

each litre of milk he has in a container. He sells 30 litre of

mixture from container and adds 10 litre milk in the remaining. The ratio

of milk and water in the final mixture is 11:5. Find the initial

quantity of milk in the container.

each litre of milk he has in a container. He sells 30 litre of

mixture from container and adds 10 litre milk in the remaining. The ratio

of milk and water in the final mixture is 11:5. Find the initial

quantity of milk in the container.

(A) 120ml

(B) 100ml

(C) 200ml

(D) 150ml

(E) 220ml

(B) 100ml

(C) 200ml

(D) 150ml

(E) 220ml

2. A milk vendor has 2 cans of milk. The first contains

25% water and the rest milk. The second contains 50% water. How much milk

should he mix from each of the containers so as to get 12 litres of milk such

that the ratio of water to milk is 3 : 5?

25% water and the rest milk. The second contains 50% water. How much milk

should he mix from each of the containers so as to get 12 litres of milk such

that the ratio of water to milk is 3 : 5?

(A) 5litre,

6litre

(B) 6litre, 6litre

(C) 6litre, 5litre

(D) 5litre, 5litre

(E) none of these

6litre

(B) 6litre, 6litre

(C) 6litre, 5litre

(D) 5litre, 5litre

(E) none of these

3. Two friends A and B leave City P and City Q

simultaneously and travel towards Q and P at constant speeds. They meet at a

point in between the two cities and then proceed to their respective

destinations in 54 minutes and 24 minutes respectively. How long did B take to

cover the entire journey between City Q and City P?

simultaneously and travel towards Q and P at constant speeds. They meet at a

point in between the two cities and then proceed to their respective

destinations in 54 minutes and 24 minutes respectively. How long did B take to

cover the entire journey between City Q and City P?

(A) 90min

(B) 45min

(C) 60min

(D) 20min

(E) 40min

(B) 45min

(C) 60min

(D) 20min

(E) 40min

4. Tia, Mina, Gita, Lovely and Binny

are 5 sisters, aged in that order, with Tia being the eldest. Each of them had

to carry a bucket of water from a well to their house. Their buckets’

capacities were proportional to their ages. While returning, equal amount of

water got splashed out of their buckets. Who lost maximum amount of water as a

percentage of the bucket capacity?

are 5 sisters, aged in that order, with Tia being the eldest. Each of them had

to carry a bucket of water from a well to their house. Their buckets’

capacities were proportional to their ages. While returning, equal amount of

water got splashed out of their buckets. Who lost maximum amount of water as a

percentage of the bucket capacity?

(A) Mina

(B) Tia

(C) Lovely

(D) Binny

(E) Gita

(B) Tia

(C) Lovely

(D) Binny

(E) Gita

5. What is the maximum percentage discount that

Sundarnath can offer on his marked price so that he ends up selling at no

profit or loss, if he had initially marked his goods up by 50%?

Sundarnath can offer on his marked price so that he ends up selling at no

profit or loss, if he had initially marked his goods up by 50%?

(A) 67.67%

(B) 25%

(C) 13.67%

(D) 27.5%

(E) 33.33%

(B) 25%

(C) 13.67%

(D) 27.5%

(E) 33.33%

6. In a game there are 70 people in which 40

are boys and 30 are girls, out of which 10 people are selected at random. One

from the total group, thus selected is selected as a leader at random. What is

the probability that the person, chosen as the leader is a boy?

are boys and 30 are girls, out of which 10 people are selected at random. One

from the total group, thus selected is selected as a leader at random. What is

the probability that the person, chosen as the leader is a boy?

(A) 4/7

(B) 4/5

(C) 3/7

(D) 1/18

(E) 2/17

(B) 4/5

(C) 3/7

(D) 1/18

(E) 2/17

7. If a sum of money grows to 144/121 times

when invested for two years in a scheme where interest is compounded annually,

how long will the same sum of money take to treble if invested at the same rate

of interest in a scheme where interest is computed using simple interest method?

when invested for two years in a scheme where interest is compounded annually,

how long will the same sum of money take to treble if invested at the same rate

of interest in a scheme where interest is computed using simple interest method?

(A) 18years

(B) 22years

(C) 21years

(D) 19years

(E) 13years

(B) 22years

(C) 21years

(D) 19years

(E) 13years

8. Area

of a Rhombus of perimeter 56 cms is 100 sq cms. Find the sum of the lengths of

its diagonals?

of a Rhombus of perimeter 56 cms is 100 sq cms. Find the sum of the lengths of

its diagonals?

(A) 29.80cm

(B) 31.20cm

(C) 34.40cm

(D) 27.60cm

(E) 24.40cm

(B) 31.20cm

(C) 34.40cm

(D) 27.60cm

(E) 24.40cm

**Answers with Solutions**– Tap to show

1.A

Let initial

quantity of milk be 10x

After adding water,

total quantity =15x

quantity of milk =10x

After selling 30 litre of mixture and adding 10 litre milk,

total quantity =(15x−30+10)=(15x−20)

quantity of milk =10x−(30×10x15x)+10=(10x−10)

10x−1015x−20=1111+5⇒x=12

Initial quantity of milk in the container

=10x=120 litre

quantity of milk be 10x

After adding water,

total quantity =15x

quantity of milk =10x

After selling 30 litre of mixture and adding 10 litre milk,

total quantity =(15x−30+10)=(15x−20)

quantity of milk =10x−(30×10x15x)+10=(10x−10)

10x−1015x−20=1111+5⇒x=12

Initial quantity of milk in the container

=10x=120 litre

2. B

Let x and

(12-x) litres of milk be mixed from the first and second container respectively

Amount of milk in x litres of the first container = .75x

Amount of water in x litres of the first container = .25x

Amount of milk in (12-x) litres of the second container = .5(12-x)

Amount of water in (12-x) litres of the second container = .5(12-x)

Ratio of water to milk = [.25x + .5(12-x)] : [.75x + .5(12-x)]=3:5 ⇒(.25x+6−.5x)/(.75x+6−.5x)=3/5

⇒(6−.25x)/(.25x+6)=3/5

⇒30−1.25x=.75x+18

⇒2x=12⇒x=6

Since x = 6, 12-x = 12-6 = 6 Hence 6 and

6 litres of milk should mixed from the first and second container respectively

(12-x) litres of milk be mixed from the first and second container respectively

Amount of milk in x litres of the first container = .75x

Amount of water in x litres of the first container = .25x

Amount of milk in (12-x) litres of the second container = .5(12-x)

Amount of water in (12-x) litres of the second container = .5(12-x)

Ratio of water to milk = [.25x + .5(12-x)] : [.75x + .5(12-x)]=3:5 ⇒(.25x+6−.5x)/(.75x+6−.5x)=3/5

⇒(6−.25x)/(.25x+6)=3/5

⇒30−1.25x=.75x+18

⇒2x=12⇒x=6

Since x = 6, 12-x = 12-6 = 6 Hence 6 and

6 litres of milk should mixed from the first and second container respectively

3. C

Let us

assume Car A travels at a speed of a and Car B travels at a speed of b.

Further, let us assume that they meet after t minutes.

Distance traveled by car A before meeting car B = a * t. Likewise distance

traveled by car B before meeting car A = b * t.

Distance traveled by car A after meeting car B = a * 54. Distance traveled by

car B after meeting car A = 24 * b.

Distance traveled by car A after crossing car B = distance traveled by car B

before crossing car A (and vice versa).

=> at = 54b ———- (1)

and bt = 24a ——– (2)

Multiplying equations 1 and 2

we have ab * t2 = 54 * 24 * ab

=> t2 = 54 * 24

=> t = 36

So, both cars would have traveled 36 minutes prior to crossing each other. Or,

B would have taken 36 + 24 = 60 minutes to travel the whole distance.

assume Car A travels at a speed of a and Car B travels at a speed of b.

Further, let us assume that they meet after t minutes.

Distance traveled by car A before meeting car B = a * t. Likewise distance

traveled by car B before meeting car A = b * t.

Distance traveled by car A after meeting car B = a * 54. Distance traveled by

car B after meeting car A = 24 * b.

Distance traveled by car A after crossing car B = distance traveled by car B

before crossing car A (and vice versa).

=> at = 54b ———- (1)

and bt = 24a ——– (2)

Multiplying equations 1 and 2

we have ab * t2 = 54 * 24 * ab

=> t2 = 54 * 24

=> t = 36

So, both cars would have traveled 36 minutes prior to crossing each other. Or,

B would have taken 36 + 24 = 60 minutes to travel the whole distance.

4. D

Tia is the

older and Binny is the youngest.

So, Binny’s bucket would have been the smallest.

Each sister lost equal amount of water.

As a proportion of the capacity of their buckets Binny would have lost the

most.

older and Binny is the youngest.

So, Binny’s bucket would have been the smallest.

Each sister lost equal amount of water.

As a proportion of the capacity of their buckets Binny would have lost the

most.

5. E

Let the cost

price of the goods to be 100x

he had initially marked his goods up by 50%.

Therefore, a 50% markup would have resulted in his marked price being 100x +

50% of 100x = 100x + 50x = 150x.

He finally sells the product at no profit or loss.

i.e., he sells the product at cost price, which in this case is 100x.

Therefore, he offers a discount of 50x on his marked price of 150x.

Hence, the % discount offered by him= Discount/MarkedPrice×100=50/150×100DiscountMarked

Price×100=50/150×100= 33.33%

price of the goods to be 100x

he had initially marked his goods up by 50%.

Therefore, a 50% markup would have resulted in his marked price being 100x +

50% of 100x = 100x + 50x = 150x.

He finally sells the product at no profit or loss.

i.e., he sells the product at cost price, which in this case is 100x.

Therefore, he offers a discount of 50x on his marked price of 150x.

Hence, the % discount offered by him= Discount/MarkedPrice×100=50/150×100DiscountMarked

Price×100=50/150×100= 33.33%

6. A

The total

groups contains boys and girls in the ratio 4:3

If some person are selected at random from the group, the expected value of the

ratio of boys and girls will be 4:3

If the leader is chosen at random from the selection, the probability of him

being a boy = 4/7

groups contains boys and girls in the ratio 4:3

If some person are selected at random from the group, the expected value of the

ratio of boys and girls will be 4:3

If the leader is chosen at random from the selection, the probability of him

being a boy = 4/7

7. B

The sum of

money grows to 144/121 times in 2 years.

If P is the principal invested, then it has grown to 144/121 P in two

years when invested in compound interest.

In compound interest, if a sum is invested for two years, the amount is found

using the following formula

A=(1+R/100)² P in this case.

=>(1+R/100)²=144/121 =>(1+R/100)²=(12/11)²=>R=100/11

If r =100/11% , then in simple interest the time it will take for a sum of

money to treble is found out as follows:

Let P be the principal invested. Therefore, if the principal trebles = 3P, the

remaining 2P has come on account of simple interest.

Simple Interest =PNR/100 , where P is the simple interest, R is the rate

of interest and ‘N’ is the number of years the principal was invested.

Therefore, 2P =PN×100/11×100 => 2 =N/11 or N = 22 years

money grows to 144/121 times in 2 years.

If P is the principal invested, then it has grown to 144/121 P in two

years when invested in compound interest.

In compound interest, if a sum is invested for two years, the amount is found

using the following formula

A=(1+R/100)² P in this case.

=>(1+R/100)²=144/121 =>(1+R/100)²=(12/11)²=>R=100/11

If r =100/11% , then in simple interest the time it will take for a sum of

money to treble is found out as follows:

Let P be the principal invested. Therefore, if the principal trebles = 3P, the

remaining 2P has come on account of simple interest.

Simple Interest =PNR/100 , where P is the simple interest, R is the rate

of interest and ‘N’ is the number of years the principal was invested.

Therefore, 2P =PN×100/11×100 => 2 =N/11 or N = 22 years

8. C

Perimeter =

56. Let the side of the rhombus be “a”, then 4a = 56 => a =14.

Area of Rhombus = Half the product of its diagonals. Let the diagonals be

d1 and d2 respectively.

1/2×d1× d2 = 100 => d1×d2 = 200.

By Pythagoras theorem, (d1)² + (d2)²= 4a² => (d1)² + (d2)² =

4×196 = 784.

(d1)² + (d2)² + 2d1× d2 = (d1+ d2)² = 784 +2×200 = 1184

=> (d1+ d2) = √1184 = 34.40

Therefore, sum of the diagonals is equal to 34.40 cm .

56. Let the side of the rhombus be “a”, then 4a = 56 => a =14.

Area of Rhombus = Half the product of its diagonals. Let the diagonals be

d1 and d2 respectively.

1/2×d1× d2 = 100 => d1×d2 = 200.

By Pythagoras theorem, (d1)² + (d2)²= 4a² => (d1)² + (d2)² =

4×196 = 784.

(d1)² + (d2)² + 2d1× d2 = (d1+ d2)² = 784 +2×200 = 1184

=> (d1+ d2) = √1184 = 34.40

Therefore, sum of the diagonals is equal to 34.40 cm .

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