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WAEC Mathematics 2019 Paper

Question : 49

Total: 50

8, 18, 10,14, 18, 11, 13, 14, 13, 17, 15, 8, 16, and 13

Solution:

Concept:

Finding the mean of a data set and counting how many values are greater than the mean.

Explanation:

There are 14 numbers in the data set.

Sum of the numbers

= 8 + 18 + 10 + 14 + 18 + 11 + 13 + 14 + 13 + 17 + 15 + 8 + 16 + 13 = 188

Mean

= \dfrac{188}{14} = 13.43

(approximately).

Now count the numbers that are greater than

13.43

18, 14, 18, 14, 17, 15, 16

There are 7 such numbers.

Answer:

D. 7

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