In a family of 21 people, the average age is 14years. If the age of the grandfather is not counted, the average age drops to 12 years. What is the age of the grandfather?

A.

35 years

B.

40 years

C.

42 years

D.

54 years

View answer & explanation

Correct answer is C

Total age of the whole family = 21 x 14 = 294

Total age without the grandfather = 21 x 12 = 252

Age of grandfather = 294 - 252

= 42 years

See all Mathematics questions & answers
See more JAMB questions & answers
Aptitude Tests

Microsoft Office Questions and Answers

Data Interpretation Questions and Answers

Numerical Reasoning Questions and Answers

Nigeria General Knowledge Questions and Answers

Verbal Reasoning Questions and Answers

Situational Judgement Questions and Answers

Spatial Reasoning Questions and Answers

Personality Test

Abstract Reasoning Questions and Answers

Quantitative Reasoning Questions and Answers

Puzzles Questions and Answers

Logical Reasoning Questions and Answers

Typing Speed and Accuracy Test

See all →


View latest jobs in Nigeria today