Question

The mean age of R men in a club is 50 years. Two men, aged 55 and 63 years left the club and the mean age
reduced by 1 year. Find the value of R

Answer 1

Answer:

R = 20

Step-by-step explanation:

mean age = sum of ages/no. of men
sum of ages of the men that left = 55 + 63 = 188
remaining sum = 50R - 118

remaining no. of men = R - 2

now mean age = 50 - 1 = 49 years
49 = 50R-118/R-2
49(R - 2) = 50R - 118
49R - 50R = -188 - 98
-R = -20
R = 20