Question

the mean of 10 numbers is 12.If 2 is added to each of the numbers,find the mean of new set of 10 numbers.​

Answer 1

Step-by-step explanation:

we know that,

$mean = \frac{sum \: of \: observations}{total \: no.of \: observations}$

so,

$12 = \frac{sum}{10}$

sum = 10 × 12

sum = 120

if 2 is added to each number then,

$new \: mean \: = \frac{sum \: + (2 \times 10)}{10}$

$= \: \frac{120 + 20}{10}$

$= \frac{140}{10}$

so the new mean is 14.

hope it helps youu