Assume that the probability that a bomb dropped from an aeroplane will strike a certain target is 0.2. If 6 bombs are dropped find the probability that (i) exactly 2 will strike the target.  (ii) at least 2 will strike the target.

The probability that a bomb dropped from a plane strikes the target is 1//5 . The probability that out of six bombs dropped at least 2 bombs stricke the target is

A,B and C can hit a target 3 times out of 5 trials, 4 times out of 5 trials and 2 times out of 5 trials. Find the probability that: (i) exactly two can hit the target (ii) at least two can hit the target.

The probability that a certain kind of component will survive a given shock test is 3/4 . Find the probability that among 5 components tested (i) Exactly 2 will survive (ii) At most 3 will survive

A coin is tossed 6 times. Find the probability of getting (i) exactly 4 heads (ii) at least 1 head (iii) at most 4 heads .

A bomb is dropped from an aeroplane when it is at a height h directly above a target. If the aeroplane is moving horizontally at a speed v, the distance by which the bomb will miss the target is given by

Three persons A, B and C shoot to hit a target. Their probabilities of hitting the target are (5)/(6),(4)/(5) and (3)/(4) respectively. Find the probability that: (i) Exactly two persons hit the target. (ii) At least one person hits the target.

The probability of a man hitting a target is (1)/(4) . If he fires 7 times. Find the probability of hitting the target exactly six times is

Three persons A, B and C shoot to hit a target. If A hits the target four times in five trials, B hits it three times in four trials and C hits it two times in three trials, find the probability that: (i) exactly two persons hit the target (ii) None hit the target.

The probability that A hits a target is 1/3 and the probability that B hits it is 2/5\ . If each one of and B shoots at the target, what is the probability that (i) the target is hit? (ii) exactly one-of-them-hits the target?

3 firemen X, Y and Z shoot at a common target. The probabilities that X and Y can hit the target are 2/3 and 3/4 respectively. If the probability that exactly two bullets are found on the target is 11/24 then find the probability of Z to hit the target.