Question
The average age of a family of 6 people is 45 years. If
the grandfather passes away, the average age drops to 40 years. Find the age of the grandfather.Solution
Let the age of the person who died be ‘x’ years. So, x + (45 – 5) × 5 = 6 × 45 x + 40 × 5 = 270 x + 200 = 270 x = 270 – 200 x = 70 years So, age of the grandfather was 70 years.
More Average Questions
12.5% of (100 + ?) = 40
2/9 of 5/8 of 3/25 of ? = 40
24 × √? + 4008 ÷ 24 = 40% of 200 + 327
7(1/2) – 3(5/6) = ? − 2(7/12)
280 ÷ 14 + 11 × 12 – 15 × 6 = ?
1550 ÷ 62 + 54.6 x 36 = (? x 10) + (28.5 x 40)
25% of 1000 + 10% of 150 – 22 × ? = 45
√ 729 × 5 – 220 % of 15 + ? = 120% of 160
What will come in the place of question mark (?) in the given expression?
(40% of ? × 43 ) – 232 = 751
180 % of 45 + √144 × 8 = ?2 + 80 % of 70
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