The Average of 12 Results is 15. the Average of the First 5 Results is 13.7 and that of the Last 5 is 16.3. the Average of the Other Two is - Mathematics

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MCQ

The average of 12 results is 15. The average of the first 5 results is 13.7 and that of the last 5 is 16.3. The average of the other two is

Options

  • 15

  • 15.2

  • 14.8

  • 15.5

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Solution

15
Explanation:
Total of 12 results = 12 x 15 = 180
Sum of the first five and last five results
= 5 x (13.7 + 16.3) = 150
Sum of the remaining two results
= 180 - 150 = 30
∴ Average of two results = 15

Concept: Average and Age
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