Question

Sheryl's mean average on eight exams is 83.750. Find the sum of her scores.
A. 770

B. 670

C. 693

D. 686

Answer 1

The answer is B. 670 

The mean average (X) is sum (s) of the values divided by the number of values n:
X = s / n

X = 83.750
n = 8
s = ?

s = X * n
s = 83.750 * 8 = 670