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Byju's Answer
Standard VIII
Mathematics
Direct Method of Finding Mean
Find the aver...
Question

Find the average score.
mean-from-a-frequency-table-how-to-work-out-the-mean-average-from-a-frequency-table

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
mean-from-a-frequency-table-how-to-work-out-the-mean-average-from-a-frequency-tableTotal frequency = 2 + 3 + 7 + 7 + 1
= 20
Total fx = 12 + 21 + 56 + 63 + 10
= 162
Average = 162/20
= 8.1

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