NABTEB Mathematics 2022 Objective — Question 38

Question 38 of 50 from the National Business and Technical Examinations Board (NABTEB) Mathematics 2022 Objective paper, with the correct answer and a full explanation.

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

A. 12
B. 13
C. 15Correct
D. 20

Explanation

Arranged in ascending order: 12,13,15,36,39,41,41,43,43,43,47,49. Lower quartile position = 1/4(n+1)th value; with the data as given, the lower quartile works out to 15.

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