Question

the mean of 5 observation x,x+2,x+4,x+6,x+8 is 13 find x​

Answer 1

Solution :

Given observations :

x ,x+2,x+4,x+6,x+8

Sum of the observations

= x+x+2+x+4+x+6+x+8

= 5x+20 ---( 1 )

Number of observations = 5

Mean = 13 ( given )

=> (2)/(1) = 13

=> (5x+20)/5 = 13

=> 5x+20 = 65

=> 5x = 65 - 20

=> 5x = 45

=> x = 45/5

=> x = 9

••••

Answer 2

Answer:

9

Step-by-step explanation:

5 observation x,x+2,x+4,x+6,x+8

Sum of 5 observation =

X + X +2 + X+4 + X+6 + X+8

= 5X + 20

Mean = (5X+20)/5 = X+4

X+4 = 13

X = 9