Question

The average of the five numbers is 790.6. If the first four numbers are 80.2, 91.6,123, and 204.7, what is the sum of the five numbers

Answer 1

3453.5

Explanation:

(a(1) + a(2) + a(3) + a(4) + a(5) ) ÷ 5 = 790.6

• a(1) = 80.2
• a(2) = 91.6
• a(3) = 123
• a(4) = 204.7

a(5) = (790.6 × 5) - (80.2+91.6+123+204.7) = 3953 - 499.5 = 3453.5