A man can hit a target 2 times out of every 3 shots. The least number of times he must shoot, so that the probability of hitting the target at least twice is more than 0.9 is

The probability of a man hitting a target 2 is He fires at the target K times (k a 5 given number). Then the minimum k so that the probability of hitting the target 7 at least once is more than 10 is

The probability of a shooter hitting a target is (3)/(4). How many minimum number of xx must he/she fire so that the probability of hitting the target at least once is more than 0.99?

The probability of a man hitting a target is 1/2. How many xx must he fire so that the probability of hitting the target at least once is more than 90% .

If the probability of hitting a target by a shooter, in any shot is 1/3, then the minimum number of independent shots at the target required by him so that the probability of hitting the target at least once is greater than (5)/(6) 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 :

How many xx must a man toss a fair coin, so that the probability of having at least one head is more than 80%?

How many xx must a man toss a fair com so that the probability of having at least one head is more than 90%?

How many xx must a man toss a fair coin so that the probability of having a least one head is more than 80%?

The probability of a man hitting a target is 1/4. How many xx must he fire so that the probability of his hitting the target at lest once is greater than 2/3?

If probability of hitting a target is 1/10 , Then number of shot required so that probability to hit target at least once is greater than 1/4 .