The average age of four players is 18.5 years. If the age of the coach is also included, the average age increases by 20%. The age of the coach is?

28 years
31 years
34 years
37 years

Correct Answer: 37 years

Explanation:

New average = 120% of old average
=120% of 18.5
= (120 x 18.5) / 100
= 22.2
Age of coach = Total weight of 4 players and coach - total weight of 4 players
= 5 x 22.2 - 4 x 18.5
= 37 years

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