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Question

Find the value of N when the mean = 4 and sum of all scores = 40.

A
10
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B
4
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C
5
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D
8
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Solution

The correct option is A 10
Mean (¯x)=fi xiN

We are given,
fi xi = 40
Mean = 4

Now we can write,

4=40N

N=404=10

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