Post-UTME Mathematics 2017 Objective — Question 5

Question 5 of 50 from the Post-UTME Screening (Post-UTME) Mathematics 2017 Objective paper, with the correct answer and a full explanation.

Class Interval / Frequency table: 45-49(6), 50-54(9), 55-59(12), 60-64(10). Find the class mark and the lower class boundary of the modal class respectively.

A. 54.5 and 59.5
B. 57.0 and 54.5Correct
C. 57.0 and 59.5
D. 62.0 and 64.5

Explanation

The modal class is 55-59 (highest frequency, 12). Class mark = (55+59)/2 = 57.0. Lower class boundary = 55 - 0.5 = 54.5.

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