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The average age of 10 children in a group is 15. If two people aged 20 and 22 join the group, what will be the new average age of the group?

A15.5

B16

C16.5

D17

Answer:

B. 16

Read Explanation:

Total age of 10 children = 15x10=150 When there are 12 children, total age = 150+ (20+22) = 150+ 42 = 192 Average = 192/12 = 16


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