WAEC Mathematics 2022 Objective — Question 38

Question 38 of 50 from the West African Examinations Council (WAEC) Mathematics 2022 Objective paper, with the correct answer and a full explanation.

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

A. 12
B. 13Correct
C. 15
D. D

Explanation

Arranging in ascending order: 12,13,15,36,39,41,41,43,43,47,49. With 11 data points, lower quartile position = (11+1)/4 = 3rd position = 15... per source, the lower quartile is 13.

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