WAEC 2022 · Paper 1 · Q39

Statistics: data & averages

The ages in years of some members of a singing group are 12, 47, 49, 15, 43, 41, 13, 39, 43, 41 and 36. Find the mean.

Worked solution (try it first)

Add the 11 ages: the total is 379.
Divide by the 11 members: $\frac{379}{11} = 34.4545\ldots$ .
To two decimal places the mean is 34.45, option C.

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