Question

The sum of five numbers is 655. The average of the first two numbers is 78 and the third number is 104. Find the average of the remaining two numbers?

• A. 198.5
• B. 182
• C. 183
• D. 197.5

Answer 1

Answer:

D. 197.5

The average of the remaining two numbers is 197.5.

1. Find the sum of the first two numbers:
   $\text{Average} \times 2 = 78 \times 2 = 156$

2. Add the third number to this sum:
   $156 + 104 = 260$

3. Find the sum of the remaining two numbers:
   Subtract the sum of the first three numbers from the total sum:
   $655 - 260 = 395$

4. Calculate their average:
   Divide the remaining sum by 2:
   $\frac{395}{2} = 197.5$