Four years ago the average age of A, B, and C was 25 years. Five years ago the average of B and C was 20 years. A’s present is:

A) 60 years

B) 37 years

C) 62 years

D) 15 years

Let the present ages of being and years respectively.
Given, $3 ( x - 4 ) + ( y - 4 ) + ( z - 4 ) = 25$

\Rightarrow x + y + z - 12 = 75

\Rightarrow x + y + z = 87

…..(1) and

2 ( y - 5 ) + ( z - 5 ) = 20

\Rightarrow y + z - 10 = 40

\Rightarrow y + z = 50

….(2)
From equations (1) and (2), we have

A

‘s age

= x = (x + y + z) - (y + z) = (87 - 50)

years

= 37

years