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Home  >>  CBSE XI  >>  Math  >>  Probability

If M and N are any two events,the probability that at least one of them occurs is

$\begin{array}{1 1}(A)\;P(M)+P(N)-2P(M\cap N)\\(B)\;P(M)+P(N)-P(M \cap N)\\(C)\;P(M)+P(N)+P(M \cap N)\\(D)\;P(M)+P(N)+2P(M\cap N)\end{array} $

1 Answer

Probability that atleast one event occurs is
$P(M \cup N)=P(M)+P(N)-P(M \cap N)$
Hence (B) is the correct answer.
answered Jul 9, 2014 by sreemathi.v
 

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