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There are four numbers. Average of first three numbers is 14 and average of last three numbers is 16. If the first number is 11, what is the last number?


1. 24
2. 30
3. 17
4. 10

1 Answer

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Best answer
Correct Answer - Option 3 : 17

Given:

Average of first three numbers = 14

Average of last three numbers = 16

Total count of numbers = 4

Concept:

Average value = Sum of all values/Number of values

Calculation:

Let, the last number = x

According to the question,

⇒ 3 × 14 + x = 11 + 3 × 16

⇒ x + 42 = 59

⇒ x = 17

∴ Last number = 17

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