Three persons work independently on a problem. If the respective probabilities that they will solve it are 1/3, 1/4 and 1/5, then find the probability that none can solve it.

Three persons work independently on a problem. If the respective probabilities that they will solve it are 1/3, 1/4 and 1/5, then find the probability that not can solve it.

The probabilities that three children can win a race are 1/3,1/4 and 1/5 . Find the probability that any one can win the race.

Three persons P, Q and R independentlytry to hit a target. If the probabilities oftheir hitting the target are 3/4,1/2 and 5/8 respectively, then the probability that thetarget is hit by P or Q but not by R is:

A problem is given to three students whose chances of solving it are 1/4, 1/5 and 1/3 respectively. Find the probability that the problem is solved.

A problem is given to that three students whose chances of solving it are 1/5,1/5,1/3 respectively. Find the probability that the problem is solved.

A problem in mathematics is given to 3 students whose chances of solving it are 1/2; 1/3; 1/4 . What is the probability that the problem is solved?

The probabilities of three mutually exclusive events are 2/3, 1/4, and 1/6. Is this statement correct?

For an initial screening of an admission test, a candidate is given fifty problems to solve. If the probability that the candidate can solve any proglem is (4)/(5) , then the probability that he is unable to solve less than two problem is

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 : Exactly two persons hit the target.

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: Exactly two persons hit the target.