Chapterwise Quantitative Aptitude Quiz from Previous Paper for IBPS Clerk 2017 – Average


Hello and welcome to exampundit. Here is a set of Chapterwise Quantitative Aptitude Quiz from Previous Paper for IBPS Clerk 2017 based on Average.

1. The average marks obtained by 100 candidates in an examination
are 45. If the average marks of the passed students are 50 while the average
marks of the failed students is 40. Then find the number of students who passed
the examination. (IBPS Clerk 2015)
(a) 30
(b) 40
(c) 50
(d) 60
(e) None of these
2. The average weight of 25 students is 16 kg. The average weight
of the first 12 students is 14 kg and of the last 12 students is 17 kg. Find
the weight of the thirteenth student. (IBPS SO 2015)
(a) 29 kg
(b) 22 kg
(c) 27 kg
(d) 24 kg
(e) None of these
3. The average age of 80 girls was 20 years, the average age
of 20 of them was 22 years and that of another 20 was 24 years. Find the average
age of the remaining girls. (SBI PO Prelim 2015)
(a) 17 years
(b) 19 years
(c) 21 years
(d) 15 years
(e) None of these
4. The height of 5 boys is recorded as, 146 cm, 154 cm, 164
cm, 148 cm and 158 cm. What is the average height of all these boys? (SBI JA
& JAA 2016)
(a) 152 cm
(b) 158 cm
(c) 156 cm
(d) 154 cm
(e) None of these
5. James’ father was 30 years old when he was born. His
mother’s age was 24 when his sister who is 5 years younger to him, was born.
What is the difference between the age of James’ father and mother? (IBPS PO
Pre 2016)
(a) 8
(b) 10
(c) 6
(d) 11
(e) 9
6. David’s present age is 2/7th of his father’s present age.
David’s brother is three year older to James. The respective ratio between
present ages of David father and David’s brother is 14:5. What is the present
age of David? (IBPS PO Mains 2016)
(a) 12 years
(b) 23 years
(c) 19 years
(d) 27 years
(e) 13 years
7. Ronit’s age is 10 years more than Rohit’s age. Also Ronit
was twice old as Rohit 15 years ago. What will be the age of Ronit 6 years
after? (SBI PO Pre 2016)
(a) 41
(b) 40
(c) 35
(d) 45
(e) 38
8. 18 years ago the ratio of A’s age to B’s age was
8:13.Present age of their ages ratio is 5:7.What is the present age of B ? (SBI
PO Mains 2016)
(a) 90 years
(b) 70 years
(c) 60 years
(d) 50 years
(e) None of these

Answers:

  1. C
  2. E
  3. A
  4. D
  5. D
  6. A
  7. A
  8. B

Solutions

1.Let P = passed students and failed students = F. So
45 × 100 = 50 × P + 40 × F and P + F = 100. Solve for F
and P, we will get P = 50.

2. Sum of the weight of 25 students
= (25 × 16)kg
Sum of the weight of first 12 students
= (14 × 12)kg = 168 kg
Sum of the weight of last 12 students
= (17 × 12) kg = 204 kg
Weight of the thirteenth student
= (400 – 168 – 204) kg = 28 kg

3. Total age of remaining 40 girls
= (80 × 20 – 20 × 22 – 20 × 24) years
= (1600 – 440 – 480) years
= 680 years
 Required average age = 680/40 = 17 years

4. Average height

= 146 + 154 + 164 + 148 + 158/5 = 770/5 = 154 cm

5. James’ age = F – 30
Sister’s age = F – 35
M = 24 + Sister’s age
M = 24 + F – 35
F – M = 11
6. 

7.  Rohit = x, Ronit = x+10
(x + 10) – 15 = 2 (x – 15)
Solve, x = 25
Ronit’s 6 years after = x + 10 + 6
= 41
8. 8x + 18/13x + 18 = 5/7
56x + 126 = 65x + 90
9x = 36
X = 4
B = 13 × 4 + 18 = 70
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