Question
The average age of a group of 15 students is 32 years.
Two persons of age 48 years and 32 years, left the group and 2 persons of age 54 years and 101 years, joined the group. Find the new average age of the group.Solution
Required average = {(15 × 32) – 48 – 32 + 54 + 101}/15 = 37 years
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