the average age of a group of 8persons was 14 years.a person with age 28years left the group and a new person with age 16 years joined the group.find the new age of the group
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average = 14, n=8
14-28 + 16-14/8 = -12/8 = -3/2
new average = 14-1.5 = 12.5 years
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Answer:
the average age will be 12.5
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