Mark (√) against the correct answer in each of the following:

The probabilities of A, B and C of solving a problem are , and respectively. What is the probability that the problem is solved?


The probability that the problem is solved = P(AB) = P(A)+P(B)+P(C)-P(AB)-P(BC)-P(CA) + 3P(ABC)


Considering independent events, P(AB) =P(A).P(B),


P(BC) =P(B).P(C), P(CA) =P(C).P(A),


P(ABC) =P(A).P(B).P(C),


Thus, P(AB) is,


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