2. Mary Has Received The Following Grades On Her First 4 Math Tests: 87, 93, 91…

2. Mary has received the following grades on her first 4 Math tests: 87, 93, 91 and 88. What grade must she receive on her 5th test to have an average of 90 in the class? a 90 b. 94 c. 89 d. 91​

Answer:

To get 90 average Mary needs to have 91 on her 5th test

Step-by-step explanation:

[tex] \frac{(87 + 93 + 91 + 88 + 91)}{5} [/tex]

Answer:

D. 91

Step-by-step explanation:

A. (87+93+91+88+90)÷5= 89.8

B. (87+93+91+88+84)÷5= 90.6

C. (87+93+91+88+89)÷5= 89.6

D. (87+93+91+88+91)÷5= 90