Question

If the mean of 2, 4, 6, 8, x, y is 5, then find the value of x + y.

 

Answer 1

The given data is 2,4,6,8,x,y. They are 6 in numbers.

The mean is

`(2+4+6+8+x+y)/6`

`=(20+x+y)/6`

But, it is given that the mean is 5. Hence, we have

`=(20+x+y)/6 = 5`

⇒ 20 + x + y = 30

⇒ x + y = 30 - 20

⇒ x + y = 10