Q. 224.5( 2 Votes )
The marks obtained by 90 students of a school in Mathematics out of 100 are given as under:
From these students, a students is chosen at random.
What is the probability that the chosen student
(i) gets 20% or less marks?
(ii) gets 60% or more marks?
Total number of students : 90
Number of students who scored less than 20% : 7
Number of students who scored more than 60% : 19
Probability P() =
(i) Let P(20) be probability of students who scored less than 20%
P(20) = =
(ii) Let P(60) be probability of students who scored more than 60%
P(60) = =
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