Table shows marks of 90 students in mathematics test.
(i) Find the probability that a student obtained less than 20% in the mathematics test.
(ii) Find the probability that a student obtained marks 60 or above.
Answer (i)
Let E be the event that student has obtained less than 20 % in the mathematics test.
P(E) = (Number of students obtained less than 20 % in the mathematics test / Total number of students)
Answer (ii)
Let F be the event that student has obtained marks 60 or above .
P(F) = (Number of students obtained marks 60 or above / Total number of students)
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