In a precision bombing attack, there is a `50%` chance that any one bomb will strick the target. Two direct hits are required to destroy the target completely. The number of bombs which should be dropped to give a `99%` chance or better of completely destroying the target can be

In a bombing attack , there is 50% chance that a bomb will hit target . At least two independent hits are required to destroy the target completely. Then the minimum number of bombs, that must be dropped to ensure that there is at least 90% chance of completely destroying the target , is ________

The probability of a bomb hitting a bridge is (2)/(3) . Two direct hits are needed to destroy the bridge. The minimum number of bombs required such that the probability of bridge being destroyed is greater than (3)/(4) , is

The probability that a missile hits a target successfully is 0.75 . In order to destroy the target completely , at least three successful hits are required . Then the minimum number of missiles that have to be fired so that the probability of completely destroying teh target is NOT less than 0.95 , 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 :

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.

If the probability that a bomb will hit a target is 60% and if 10 bombs are dropped then find mean and variance.

A certain type of missile hits its target with probability 0.3. How many missiles should befired so that there is at least an 80% chance of hitting the target?

At the height 320 m , an aeroplane is moving with 100 m//s . A bomb is droped from it so as to hit a target. At what horizontal distance from the target should the bomb be dropped

At the height 80 m , an aeroplane is moving with 150 m//s . A bomb is dropped from it so as to hit a target. At what distance from the target should the bomb be dropped (given g = 10 m//s )