Question

Average age of a group of 16 boys is 21

years. Two boys with ages 15 years and 18 years

left the group. One boy with age 24 years joined

the group. What is the new average age (in

years) of the group?

A. 21.2

B. 21.8

C. 21.4

D. 21.6​

Answer 1

Answer: 21.2 is the answer

Answer 2

Answer:

21.8

Step-by-step explanation:

average age = 21

total age of boys = 21*16 = 336

two boys left then 15+18 = 33

total age after the boys left = 336-33 = 303

total age after a boy join = 303+24 = 327

new average age = 327/15 = 21.8