Question

Bob has scores of 72, 95 and 80 on his first three test what score does he need to get on his for test to have an average of at least an 85

Answer 1

He has to get 93 score in the fourth test.

He scored 72, 95 and 80 in the 1st three tests.The summation of the scores become (73+95+80)=247.

Now to get an average of 85 ,he has to score a total of (85×4)=340 score.

So in the last test the score needed for him to get an overall average of 85 is 340–247=93.

Explanation: