Question

6. The average age of 4 children is 11yr. If the
ages of 3 children are 9 yr, 12 yr and 10 yr,
find the age of the fourth child. JNV 2001)​

Answer 1

Answer:

The age of 4th child is 13

Step-by-step explanation:

Let the age of 4th child be x

Given, age of 3 child 9yr, 12yr, 10yr

Now, according to question

Average=sum of age of 4 child÷number of childs

11=(9+10+12+x) /4

44=31+x

x=44-31

x=13

Hence, the age of 4th child is 13.

Answer 2

13 yr

Step-by-step explanation:

Total Ages of 3 childrens = 9+12+10 = 31 yr

Total age of 4 children = 11×4 = 44 yr

Age of 1 child = 44-31 = 13 yr Ans...

PLEASE

PLEASE

PLEASE

PLEASE

PLEASE

PLEASE

PLEASE

PLEASE

PLEASE THANKS MY ANSWER...