Question

In a class average age of 25 boys is 13. If 13 boys each of age 7 years are added, what would be the new average?​

Answer 1

Answer:

Step-by-step explanation:

25*13=325

13*7=91

325+91\20=20.8

Answer 2

Given - Original average

Find - New average

Solution - New average is 10.9.

Sum of age of 25 boys = 25*13

Sum of age of 25 boys = 325

New average = sum of all the boys/total number of boys

Total number of boys =25 + 13

Total number of boys = 38

New sum of ages = 325 + (13*7)

New sum of ages = 416

New average = 416/38

New average = 10.9

So, new average is 10.9.