Question

the mean of eight number is 15 if is number multiplied by 2 what will be the new mean​

Answer 1

Answer:

The mean of 8 numbers=15

$the \: sum \: of \: these \: numbers \: = 15 \times 8 = 120$

If two is multiplied to each number ,then

the sum of the numbers will also be multiplied by two.

$then \: the \: new \: sum \: of \: numbers \: = 120 \times 2 = 240$

$then \: the \: new \: mean \: = 240 \div 8 = 30$

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