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Calculating the Mean

The 30 members of an orchestra were asked how many instruments each could play. The results are set out in the frequency distribution. Calculate the mean number of instruments played:

Number of instruments, x 1 2 3 4 5
Frequency, f 11 10 5 3 1

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The solution discusses the 30 members of an orchestra were asked how many instruments each could play. The results are set out in the frequency distribution. Calculate the mean number of instruments played:

Number of instruments, x 1 2 3 4 5
Frequency, f 11 10 5 3 1

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