Question

1. If the mean of 5 observations x,x+2, x +4, X+6 and x+8 is 11, find the
value of x.

[CBSE 2014)




2. If the mean of 25 observations is 27 and each observation is decreased by 7 , what will be the new mean?​

Answer 1

Answer:

1.x=-9/5

Step-by-step explanation:

1

x+(x+2)+(x+4)+(x+6)+(x+8)=5x+20

now,

(5x+20)=11

5x=-9

x=-9/5