Question

The average age of four children is 10 years. If sum of the ages of three children is 32 years, find the age of the 4th child.​

Answer 1

Answer:8

Step-by-step explanation: average =sum/total no.

so,10 multiply by 4 =40=sum of age of 4

Sum of age of three children =32

so 40-32=8

so 4 th child age =8

Answer 2

Mean or average age of four children = 10 years
Sum of the ages of three children=32
Let the age of fourth children be x .
Now,
Mean age= Sum of observations/ total no.of observations
10 = 32 + x / 4
40 = 32 + x
40 - 32 = x
8 = x
x = 8


Hence, the age of the fourth child is 8 years.

Hope it helps you……