In Class XI of a school 40% of the students study Mathematics and | Filo
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Class 11

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Probability

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In Class  of a school % of the students study Mathematics and % study Biology, % of the class study both Mathematics and Biology. If a student is selected at random from the class, find the probability that he will be studying Mathematics or Biology. 

Solution: Let be the event in which the selected student studies Mathematics and   be the event in which the selected student studies Biology
Accordingly %
%
%
We know that and

Thus the probability that the selected student will be studying Mathematics or Biology is
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