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Finding Mean for Grouped Data When Class Intervals Are Not Given

What is the a...

Question

What is the average of first five composite numbers ?

A

3

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B

7.4

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C

5.6

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D

7

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Solution

The correct option is B 7.4
The first five composite numbers are 4, 6, 8, 9, 10.
Average or mean of these numbers = $\frac{S u m o f f i v e c o m p o s i t e n u m b e r s}{5} = \frac{4 + 6 + 8 + 9 + 10}{5} = \frac{37}{5} = 7.4$ The average of first five composite numbers is 7.4

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Finding Mean for Grouped Data When Class Intervals Are Not Given

Standard VIII Mathematics

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