The average age of 25 boys in a class decreases by 6 months when a new boy takes the place of a 20 year old boy. The age of the new boy is?
Answers
Answered by
3
Answer:
7.5 years
Step-by-step explanation:
Total reduction in age = 25 x 6 / 12 = 12.5 years
Age of the new boy = 20 - 12.5 = 7.5 years
Answered by
4
Answer : 7.5 yr
Step-by-step explanation:
Total reduction in age = 25*6/12
= 12.5 yr
Age of the new boy = 20-12.5
= 7.5 yr
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