WAEC Mathematics 2018 Theory — Question 9
Question 9 of 23 from the West African Examinations Council (WAEC) Mathematics 2018 Theory paper, with the correct answer and a full explanation.
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5. The table shows the distribution of scores obtained when a fair die was rolled 50 times. (a) Draw a bar chart for the distribution. (b) Calculate the mean score of the distribution.
Model answer
(a) A bar chart should show bars of heights 2, 5, 13, 11, 9 and 10 for scores 1–6 respectively. (b) Mean = Σfx/Σf = (1×2+2×5+3×13+4×11+5×9+6×10)/50 = 200/50 = 4.
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