Post-UTME Mathematics 2009 Objective — Question 15
Question 15 of 15 from the Post-UTME Screening (Post-UTME) Mathematics 2009 Objective paper, with the correct answer and a full explanation.
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In a family of 21 people, the average age is 14 years. 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 yearsCorrect
Explanation
Total age of 21 = 294; total age of remaining 20 = 240; grandfather's age = 294-240 = 54 years.
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