A and B are two students. Their chances of solving a problem correctly are `1/3 and 1/4`, respectively If the probability of their making a common error is, 1/20 and the obtain the same answer, then the probability of their answer to be correct is

A and B are two students. Their probabilities of solving a problem correctly are 1/4 and 1/5 respectively. If the probability of their making a common error is 1/40, and they obtain the same answer, then the probability of their answer is correct is

X and Y are two weak students in mathematics and their chances of solving a problem correctly are 1/8 and 1/12 respectively. They are given a question and they obtain the same answer. If the probability of common mistake is (1)/(1001) ,then probability that the answer was correct is a/b (a and b are coprimes).Then |a-b|=

A problem is given to three students whose chances of solving it are 1/2,1/3 and 1/4 respectively.What is the probability that: None solve the problem.

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 three students whose chances of solving it are 1/4, 1/5 and 1/6 respectively. Find the probability that the problem is solved.

A problem is given to three students whose chances of solving it are 1/2, 1/3 and 1/4 respectively. What is the probability that the problem will not be solved?

A problem in mathematics is given to three students whose chances of solving it correctly are 1/2,1/3 and 1/4' respectively.what is the probability that only one of,them solves it correctly?

A problem is given to three students whose chances of solving it are 1/4, 1/5 and 1/6 respectively. What is the probability that the problem will be solved?