Question

The average age of 8 men is increased by 4
yr when one of them whose ages is 30 yr
is replaced by a new man. What is the age
of new man?
(A) 55 yr
(B) 62 yr
(C) 42 yr
(D) 69 yr​

Answer 1

The average age of 8 men is increased by 4 years when one of them whose age is 30 years is replaced by a new man. What is the age of new man?

A) 55 YearsB) 62 YearsC) 42 YearsD) 69 Years

Answer:   B) 62 Years

Explanation:

Let the average of 8 men be x. Age of new man be N.

Total age of 8 men = 8x

⇒ x + 4 = ((8x – 30) + N)/8

⇒ 8x + 32 = 8x – 30 + N

⇒ N = 32 + 30

⇒ N = 62