Question

Question was provided via image upload.

Explanation:

Step1: Determine all scores

First two scores: 75 each (so 75, 75). Third score: 75 + 10 = 85. Fourth score: 95. Fifth score: 90.

Step2: Sum all scores

Sum = 75 + 75 + 85 + 95 + 90. Calculate: 75+75=150; 150+85=235; 235+95=330; 330+90=420.

Step3: Calculate average

Average = Total sum / Number of tests = 420 / 5 = 84.

Answer:

B. 84