WAEC Further Mathematics 2022 Objective — Question 28
Question 28 of 40 from the West African Examinations Council (WAEC) Further Mathematics 2022 Objective paper, with the correct answer and a full explanation.
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The mean heights of three groups of students consisting of 20, 16 and 14 students each are 1.67m, 1.5m and 1.40m respectively. Find the mean height of all the students.
- A. 1.63m
- B. 1.52m
- C. 1.54mCorrect
- D. 1.42m
Explanation
Total height = 20(1.67)+16(1.5)+14(1.40) = 33.4+24+19.6 = 77m. Total students = 50. Mean = 77/50 = 1.54m.
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