Question
The average age of three children is 20 years. If their
ages are in the ratio 5:6:9. Find the age of the youngest child.Solution
Total age of three children = 20 × 3 = 60 years Let their ages be 5x, 6x and 9x respectively. => 5x + 6x + 9x = 60 => 20x = 60 => x = 3 Therefore the age of youngest child = 5 × 3 = 15 years
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