The average age of three children is 15 years. If their ages are in the ratio 2:3:4. Find the age of the youngest child.
Total age of three children = 15 × 3 = 45 years Let their ages be 2x, 3x and 4x respectively. => 2x + 3x + 4x = 45 => 9x = 45 => x = 5 Therefore, the age of youngest child = 2 × 5 = 10 years
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