Question

The average of 6,10,x,20 and 30 is 18. what is the value of x​

Answer 1

`x = 24`

Explanation:

`6 + 10 + x + 20 + 30 = 18`

There are 5 numbers that we must add to average out to get 18 so let set this equation up

`(6 + 10 + x + 20 + 30)/(5) = 18`

`6 + 10 + x + 20 + 30 = 90`

`x = 24`

Answer 2

24

Explanation:

18 times 5 is 90 so that means that the given numbers have to add up to 90 (including x)

so,

6+10+20+30=66

90-66=24

I hope this helps!