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Question

This frequency table shows the results of a small class quiz If a student is selected at random the probability that he or she scored 2, 4 or 5 is

MarksFrequency
14
23
32
46
55

A
320
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B
14
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C
710
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D
920
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Solution

The correct option is C 710
Total number of students in the class = 4 + 3 + 2 + 6 + 5 = 20
Number of students scoring 2, 4 or 5 = 3 + 6 + 5 = 14
P(2, 4 or 5) = 1420=710

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