100+ Problems on Average Aptitude Questions for Bank Exams - 2

Question: 6

The arithmetic mean of 15 numbers is 41.4. Them the sum of these numbers is

(A) 420

(B) 620

(D) 720

View Answer

Ans: C

Sum of numbers = (41.4 × 15) = 621.

Question: 7

Five years ago, the average age of P and Q was 15 years. Average age of P, Q and R today is 20 years. How old will R be after 10 years?

(A) 30 years

(B) 35 years

(D) 50 years

View Answer

Ans: A

(P + Q), five years ago = 15 × 2 = 30 years.

(P + Q), now = (30 + 5 × 2) years = 40 years

(P + Q + R), now = (20 × 3) years = 60 years

∴ R, now = (60 – 40) = 20 years

R, after 10 years = (20 + 10) years = 30 years

Question: 8

The average age of 25 boys in a class is 16 years. If the age of two teachers was added, the average increases by one. What is the sum of the ages of the two teachers?

(A) 59 years

(B) 62 years

(D) 64 years

View Answer

Ans: A

Total age of 25 boys = 16 × 25 = 400 years.

Total age of 25 boys + 2 teachers = 27 × 17 = 459 years

∴ Age of two teachers = 459 – 400 = 59 years.

Question: 9

The average of Rohan’s marks in 7 subjects is 75. Her average in six subjects excluding science is 72. How many marks did she get in science?

(A) 70

(B) 80

(D) 93

View Answer

Ans: D

Marks in science = ( 7 × 75 – 6 × 72) = 93.

Question: 10

The average weight of 16 boys in a class is 50.25 kgs and that of the remaining 8 boys is 45.15 kgs. Find the average weight of all the boys in the class.

(A) 48 kgs

(B) 48.55 kgs

(D) 49.55 kgs

View Answer

Ans: B

Required average = $$({50.25 × 16 + 45.15 × 8} / {16 + 8})$$

= $$({804 + 361.20} / {24})$$

= $${1165.20} / {24}$$ = 48.55.

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100+ Problems on Average Aptitude Questions for Bank Exams - 2

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