Question

Rita's grades in four tests are 82, 80, 76 and 70. What grade must she get on the fifth test to raise her average to 80 ?

• A. 86
• B. 88
• C. 92
• D. 96
• E. 98

Answer 1

Answer: (C)

92

Suppose she must get x grades in the fifth test
$\therefore \frac{82+80+76++70+x}{5}=80$
$308+x=400$
or x = 92