Question

the mean of 8 numbers is 25 if 5 is subtracted from each number what will be the new mean​

Answer 1

Answer

The new mean is 6.4

Step-by-step explanation:

Answer 2

let the 8 no be x1,x2, - - - -,x8

(x1+x2+x3+x4+x5+x6+x7+x8)/8=25

x1+x2+ - - - -+x8 = 200. ----(1)

now

(x1-5)+(x2-5)+ - - - - - (x8-5)/8= new mean

(x1+x2+ - - - - x8 -40)/8

put value from equation 1

(200-40)/8

new mean = 160/8= 20