Question

the average age of 7 boys is 20 years.If the average age of six Boyd is 19 1/2 years then find the age of seventh boy

Answer 1

hope it helps......

Answer 2

Answer:

23

Step-by-step explanation:

Given that,

The average age of 7 boys = 20 years

Then the sum of the age of 7 boys = 20 * 7 = 140 years

Given that ,

The average age of 6 boys = 19 1/2 years = 39 / 2 years

Then the sum of the age of 6 boys = 39 / 2 * 6 = 117 years

Hence, the age of 7th boys = 140 - 117 = 23 year