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Introduction To Mathematical Modelling

Question
CBSEENMA9004112

In a survey of 200 men, it was found that 65 men take only coffee, 35 take only tea, 25 donot take either and the rest take both coffee and tea. Find the probability that a man selected at random:

(a)  takes coffee
(b)  takes only tea 

Solution

Solution not provided.
Ans.   left parenthesis straight a right parenthesis space 7 over 10 space space space space space left parenthesis straight b right parenthesis space space 11 over 18 space space