Question
Sum of ages of 55 team members is 1220 years. The
average age of 20 of them is 19 years and the average age of another 15 of them is 20 years. Find the average age of the remaining members.Solution
Given, sum of age of 55 team members = 1220 years
Sum of age of 20 members = 20 × 19 = 380 years
Sum of age of another 15 members = 15 × 20 = 300 years
Remaining number of members = 55 – 20 – 15 = 20
Average age of remaining 20 members = {(1220 – 380 – 300)/20} = (540/20) = 27 years
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