Suppose the chances of hitting a target by a person X is 3 times in 4 shots, by Y is 4 times in 5 shots, and by Z is 2 times in 3 shots. They fire simultaneously exactly one time. What is the probability that the target is damaged by exactly 2 hits ?

A coin is tossed 3 times. The probability of getting exactly 2 heads is ________.

A, B, C shoot to hit a target. If A hits the target 4 times in 5 trials, B hits it 3 times in 4 trials and C hits it 2 times in 3 trials. Find the probability that the target is hit by i. exactly 2 persons. ii. exactly 3 persons. iii atleast 2 persons. iv. atmost 2 persons. V. none.

A man speaks truth 3 out of 4 times. He throws a die and reports that it is a six. What is the probability that is a six?

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 that Mr. Q hits a target at any trial is 1/4 . Suppose he tries at the target 10 times. Find the probability that he hits the target (i) exactly 4 times (ii) at least one time.

The probability of hitting a target by three marksmen are 1/2, 1/3 and 1/4. Then find the probabi9lity that one and only one of them will hit the target when they fire simultaneously.

A die is thrown 31 times. The probability of getting 2,4 or 5 at most 15 times is

A die is thrown 7 times. What is the chance that an odd number turns up (i) exactly 4 times (ii) at least 4 times