The bar chart shows the marks distribution in a... - WAEC Mathematics 2010 Question
The bar chart shows the marks distribution in am English test. What percentage of the students had marks ranging from 35 to 50?
A
55
B
60%
C
65%
D
66
correct option: d
Percentage of students with marks ranging from 35 to 50 = (\frac{f_{35} + f{40} + f{50}}{\sum f})
= (\frac{35 + 40 + 45}{20 + 35 + 40 + 45 + 25 + 15}) x 100%
= (\frac{120}{180}) x 100%
= 66(\frac{2}{3})%
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