Question

the mean of 12number is seven if 2us added to each number what will be the new mean​

Answer 1

Answer:9

Step-by-step explanation:

Sum=12*7=84

As there are 12 numbers 24 will be added

New mean =84+24/12

=108/12

=9

Answer 2

let mean in first case be x

total no. =12

so mean = x/12

x/12=7

x=12×7=84

.

now. of 2 is added to each no. means there are 12 no. so total added is 12×2=24

so new mean=

x+24/12

84+24/12 (as x=84)

108/12

=9 ans.