Q.
In a class 40% students study mathematics 25% study chemistry and 15% both mathe-matics and chemistry. If a student is chosen at random the probability that he studies mathematics, if it is known that he studies chemistry is
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a
18
b
38
c
25
d
35
answer is D.
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Detailed Solution
Given that: P(M)=40%, P(C)=25% and P(M∩C)=15% P(MC)=P(M∩C)P(C)=15%25%=35
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