Question

The mean of X,X plus 3,X plus 5, X +7 and X +10 is nine then the value of x is

Answer 1

Correct option is

C

11

3

1

Mean of x,x+3,x+5,x+7,x+10=9

Sum of the terms =5x+25

Mean =

5

5x+25

=9

x+5=9

x=4

Last three observations are 9,11,14

Mean =

3

9+11+14

=11

3

1