Question

The average age of three girls is 24 years if thier ages are in the ratio of 5:6:7.find the age of the youngest girl​

Answer 1

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Answer 2

hey here is your answer

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Let the ages of girls are 5x,6x and 7x

Let the ages of girls are 5x,6x and 7xAverage is calculated by the sum divided by the count. Average of three numbers is given by the sum of the three numbers divided by three.

average (5x+6x+7x)/3

average (5x+6x+7x)/318x/ 3 = 24*3

average (5x+6x+7x)/318x/ 3 = 24*318x = 72 *3 = 216

average (5x+6x+7x)/318x/ 3 = 24*318x = 72 *3 = 216x= 216/18 = 12

x = 12

x = 12so 5x = 5 * 12= 60

6x= 6 * 12 =72

7x= 7 * 12 =84

Age of younger girl is 84

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