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The mean of 15 numberd is …

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The mean of 15 numberd is 5.if 2 is added to each number, then what will be the new mean

Posted by Anushka Agrawal 5 years, 5 months ago

CBSE > Class 07 > Mathematics

2 answers

Umar Shariff 5 years, 5 months ago

The new mean =105/15=7

1Thank You

Gaurav Seth 5 years, 5 months ago

The mean of 15 numbers is 5
therefore their sum=15*5=75

if 2 is added to each number then 2 is added to the all the 15 numbers

therefore 2*15 or 30 more will be added to the sum or 75
=75+30=105

therefore new mean = 105/15=7 [mean=sum of observations/no. of observations]

1Thank You

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CBSE > Class 07 > Mathematics