The average of a group of men is increased by 5 years when a person aged of 18 years is replaced by a new person of aged 38 years. How many men are there in the group?
A. 3
B. 4
C. 5
D. 6
Show Answer
Answer-B
Solution-
Solution(By Apex Team)
Let N be the no. of persons in the group.
Required number of person is given by;
Member in group × aged increased = difference of replacement
$\begin{array}{l}\text{N × 5 = 38 – 18}\\
\text{Or, 5N = 20}\\
\text{Or, N = 4}\end{array}$
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