Railways
R.R.C. (Kolkata) Solved Paper Held on 2nd Shift 9-11-2014
question_answer
The average age of a group of men is increased by 5 years when a person aged 18 years is replaced by a new person aged 38 years. How many men are there in the group?
A)3
B)4
C)5
D)6
Correct Answer:
B
Solution :
Suppose there are x men in the group. Then, \[5x=38-18\] \[5x=20\] \[x=4\]