The sum of five numbers is 655. The average of the first two numbers is 78 and the third number is 118. Find the average of the remaining two numbers?

Correct option is B

Given:

Sum of 5 numbers = 655

Average of first two numbers = 78

Third number = 118

Need: Average of last two numbers

Formula Used:

$$\text{Average} = \frac{\text{Sum of all observations}}{\text{Number of observations}}$$​​

Solution:

Sum of first two numbers = 78 × 2 = 156

Sum of first three numbers = 156 + 118 = 274

Sum of last two numbers = 655 - 274 = 381

Average of last two numbers =$$\frac{381}{2} =$$​190.5