the mean of 21 number is 15 if each number is multiplied by 2 what will be the new mean
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30-is the answer
mean,of 21 number is 15.
then sum of 21number is 21*15=315
if all 21number multiply by 2 then sum also double new sum 21*15*2=630
new mean=630/21
=30
mean,of 21 number is 15.
then sum of 21number is 21*15=315
if all 21number multiply by 2 then sum also double new sum 21*15*2=630
new mean=630/21
=30
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