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WAEC Mathematics 2022 Paper

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Question : 36

Total: 47

The age (years) of some members in a singing group are: 12, 47, 49, 15, 43, 41, 13, 39, 43, 41 and 36.

33.35
35.54
34.45
36.44

Solution:

Concept:

The mean is the sum of all data values divided by the number of values.

Explanation:

The ages are:

12, 47, 49, 15, 43, 41, 13, 39, 43, 41, 36

.

Number of members

= 11

.

Sum of ages

= 12 + 47 + 49 + 15 + 43 + 41 + 13 + 39 + 43 + 41 + 36

.

Sum

= 379

.

Mean

= \frac{379}{11} = 34.45

.

Answer:

Mean age

= 34.45

years, i.e. Option C.

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