A, B and C try to hit a target simultaneously but independently. Their recpective probabilities of hitting the target are `3/4, 1/2, 5/8`. The probability that the target is hit by A or B but not by C is

A, B, C try to hit a target simultaneously but independently. Their respective probabilities of hitting the target are 3/4,1/2,5/8 . The probability that target is hit by A or B but not by C is

A, B, C try to hit a target simultaneously but independently. Their respective probabilities of hitting the target are (3)/(4),(1)/(2),(5)/(8) . The probability that target is hit by A or B but not C is

A, B and C try to hit a target simultaneously but independently. Their respective probabilities of hitting the target are 3/4, 1/2 and 5/8 . Find the probability that the target: is hit by exactly one of them.

Three persons P, Q and R independentlytry to hit a target. If the probabilities oftheir hitting the target are 3/4,1/2 and 5/8 respectively, then the probability that thetarget is hit by P or Q but not by R is:

Three persons A,B and C fire a target in turn . Their probabilities of hitting the target are 0.4 , 0.3 and 0.2 respectively . The probability of two hits is

The probability of a man hitting the target is 1/4. If he fires 7 times, the probability of hitting the target at least twice is