The sum of five numbers is 655. The average of the first two numbers is 77 and the third number is 128. Find the average of the remaining two numbers?

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  1. 206
  2. 205
  3. 186.5
  4. 187.5

Answer (Detailed Solution Below)

Option 3 : 186.5
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Detailed Solution

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Given:

The sum of five numbers is 655.

The average of the first two numbers is 77.

The third number is 128.

Formula used:

Average = (Sum of quantities) / (Number of quantities)

Calculation:

Sum of the first two numbers = 77 × 2 = 154

Sum of the five numbers = 655

Sum of the first three numbers = 154 + 128 = 282

Sum of the remaining two numbers = 655 - 282 = 373

Average of the remaining two numbers = 373 / 2

⇒ Average of the remaining two numbers = 186.5

∴ The correct answer is option (3).

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