Question

Given the first three test scores find the fourth test score needed to reach the desired average. I have scores, 85,88 and 75 desired average 85 what’s the fourth test for

Answer 1

92

Explanation:

The answer we need can be obtained fairly simply. If there are four tests total, then to get the average of 85, a number has to be divided by four to get that number.

So we can multiply 85 times 4 to get the number that we need at the end, which is 340

To get the average of a number, you sum up all of the inputs and divide it by the amount of those inputs. So we can add the three test scores:

85 + 88 + 75 = 248

So we need to get from 248 to 340, so we can just subtract them.

340 - 248 = 92

So the final score needed is 92