Question

If the arithmetic mean of 7, 5, 13, x and 9 is 10, then the value x is

पर्याय

• 10

• 12

• 14

• 16

Answer 1

The given data is 7, 5, 13, x and 9. They are 5 in numbers.

The mean is

`(7+5+13+x+9)/5`

`=(34+x)/5`

But, it is given that the mean is 10. Hence, we have

`(34+x)/5 =10`

⇒  34 +x = 50

⇒ x = 50 -34

⇒ x = 16