Question 1143128
<br>
Here is a way that you might find faster and easier when working a problem like this involving the average of numbers that are "close together".<br>
Comparing each score to the desired average of 88...<br><pre>
80-88 =  -8
95-88 =  +7
75-88 = -13
90-88 =  +2
      -----
        -12</pre>
Overall, her current point total is 12 points below the desired average; that means her next test must be 12 points above the desired average.<br>
ANSWER: She needs a score of 88+12 = 100 on the next test to get an average of 88.