A bomber wants to destroy a bridge . Two bombs are sufficient to destroy it. If four bombs are dropped, what is the probability that it is destroyed. if the chance of a bomb hitting the target is `0.4`.

The probability that a bomb will miss a target is 0.2. The probability that out of 5 bombs dropped, exactly 4 will hit the target is

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 2will strike the target.

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 of a bomb hitting a bridge is 1//2 and two direct hits are needed to destroy it . The least number of bombs required so that the probability of the bridge being destroyed is greater then 0.9 is

The probability of a bomb hitting a bridge is 1/2 and two direct hits are needed to destroy it. The least number of bombs required so that the probability of the bridge being destroyed is greater than 0.9, is :

The probability of a bomb hitting a bridge is 1/2 and two direct hits are needed to destroy it. The least number of bombs required so that the probability of the bridge being destroyed is greater than 0.9, is :

The probability that a bomb will hit a target is 0.8. The probability that out of 10 bombs dropped, exactly 2 will miss the target is

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

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