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Direct Method of Finding Mean

Find the aver...

Question

Find the average score.

A

8.4

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B

8.1

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C

7.8

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D

7.9

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Solution

The correct option is B 8.1
Total frequency = 2 + 3 + 7 + 7 + 1
= 20
Total fx = 12 + 21 + 56 + 63 + 10
= 162
Average = 162/20
= 8.1

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Direct Method of Finding Mean

Standard VIII Mathematics

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