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What would be the new average age of the group, if few left the group and few joined in?

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The average age of 20 students is 16. 2 students of ages 17 and 13 leave the group and 2 new of ages 10 and 11 join the group. What would be the new average age of the group?

posted Apr 14, 2015 by anonymous

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1 Answer

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20*16 = 320 is total age
New total age is 320-30+21 = 311
New average = 311/20 = 15.55

answer Apr 15, 2015 by Sreejith Pottathil

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