Question

Tasha's scores on her first five tests were as follows. 74, 90, 92, 83, 81 What would Tasha have to score on the sixth test to have a mean of 85?

Answer 1

For this case, what we must do is calculate the mean of the given data.
For this, we must do the following:
Add the given numbers and divide by the number of numbers.
We have then:

`(74+90+92+83+81+x)/(6)=85`
From here, we clear the value of x.
We have then:

`x = 6 * 85 - (74 + 90 + 92 + 83 + 81) x = 90`
Answer:
Tasha would have to score 90 on the sixth test to have a mean of 85