Question

5. The average age of eleven football players is 20 years, if the age of the coach is also included average age increases by 10%. The age of the coach is
(a) 48 years
(c) 40 years
(b) 44 years
(d) 36 years​

Answer 1

Answer:

Average age of 11 players = 20 years

Total age of 11 players = 20(11) = 220 years

Now

If the age of coach will included then total members will become 12 and the average age becomes = 20 + 10%of 20 = 22 years

So Total age of 12 members = 22(12) = 264 years

So the age of coach =

Total age after including the coach - Total age of 11 players = 264 - 220 = 44 years