Question

the average age of 8 children of a family is 12 years if the age of seven children are 12, 8, 14, 11, 9, 13 and 15 years then the age of the eighth child will be

Answer 1

Answer:14 years

Step-by-step explanation:

Let the age of eighth child be x years.

Then by question,

(12+8+14+11+9+13+15+x)/8=12

Or,82+x=12×8

Or,x=96-82

Therefore,x=14 years