Question
The average age of a group of 12 students is 32
years. Two persons of age 40 years and 31 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 = {(12 × 32) – 40 – 31 + 54 + 101}/12 = 39 years
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