Question

In a group there are 4 men. The average age of the four before 2 years is 55, after some days one man is added and his age is 45. What is the average age of all?

a.55

b.54.5

c.54.6

d.54.7

Answer 1

First multiply 45 by 4 in order to get the total age of the four persons. Then find out their total age after 4 years each. Therefore 180 +(4x4) or 196. Then add the new man's age ie 196+49 or 245. Therefore average = 245/5 or 49 (answer)