Average & Problems on Ages Quiz | Quantitative Aptitude MCQ Practice for IBPS AFO 2026

1

A club has 15 men (avg 10 years) and 25 women (avg 12 years). What is average age of club?

Solution & Explanation Total age = (15 × 10) + (25 × 12) = 150 + 300 = 450. Average = 450 ÷ 40 = 11.25.

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2

Average weight of a class is 60 kg and average weight of boys is 80 kg. Ratio of boys to girls is 5:4 and total students 72. Find average weight of girls.

Solution & Explanation Boys=40, Girls=32. Total weight=4320. Boys weight=3200. Girls weight=1120. Avg=1120/32=35.

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3

4 years ago ratio of Shivam to Deepak was 2:3 and ratio of Shivam 4 years ago to Deepak 5 years hence is 8:15. Find present age of Shivam.

Solution & Explanation 4 yrs ago S=2x, D=3x. (2x)/(3x+9)=8/15 => 30x=24x+72 => x=12. Present S = 2x+4 = 28.

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4

The average of 12 results is 15 and average of first two is 14. What is average of remaining ten?

Solution & Explanation Total = 12 × 15 = 180. First two = 2 × 14 = 28. Remaining = 180 - 28 = 152. Average = 152 ÷ 10 = 15.2.

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5

Average weight of a family of X members is 18 kg. After three marriages average increases by 1 kg. After old man dies (18 kg more than wives total) average becomes 16 kg. Find X.

Solution & Explanation Initial total weight = 18X After 3 marriages, members = X+3 and average = 19 ⇒ New total = 19(X+3) Wives’ total weight = 19(X+3) − 18X = X+57 Old man’s weight = X+57+18 = X+75 After old man dies: 19(X+3) − (X+75) = 16(X+2) ⇒ 18X − 18 = 16X + 32 ⇒ 2X = 50 ⇒ X = 25

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Average & Problems on Ages Quiz for IBPS AFO 2026

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