Question

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





please tell the correct sis / bro ​

Answer 1

Answer:

17

Step-by-step explanation:

let the numbers br x1, x2,x3

(x1+x2+x3)÷3=15. --(i)

now 2 is added to each numner

new mean = (x1 +2+x2+2+ x3+2)÷3

=(x1+x2+x3+6)÷3

=(x1+x2+x3)÷3. +6/3. --(ii)

we know from (i) that (x1+x2+x3)÷3 =15

putting this value in (ii)

mean = 15+2 =17