For three persons A, B and C the chances of being selected as Manager of a firm are in the ratio `4:1:2` respectively. The respective probabilities for them to introduce a radical change in marketing strategy are 0.3, 0.8 and 0.5. If the change does take place, find the probability that it is due to the appointment of B or C.

Three persons A, B and C apply for a job of Manager in a Private Company. Chances of their selection (A, B and C) are in the ratio 1 : 2 : 4. The probabilities that A, B and C can introduce changes to improve profits of the company are 0.8, 0.5 and 0.3 respectively. If the change does not take place, find the probability that it is due to the appointment of C.

Three persons A,B and C apply for a job of manager in a private company. Chances of their selection are in the ratio 1:2:4. The probabilities that A,B and C can introduce changes to improve profits of the company are 0.8, 0.5 and 0.3 respectively. If the change does not take place, find the probability that it is due to appointment of C.

Three persons A,B and C fire at a target in turn, starting with A. their probabilities of hitting the target are 0.4, 0.3 and 0.2 respectively. The probability of two hits is

Probabilities of A, B and C of solving a problem are 1 /4, 1 /3 and 1 /5 respectively. If they all try to solve the problem then find the probability that exactly one of them will solve the problem.

Probabilities of A, B and C of solving a problem are 1/2, 1 /3 and 1/4 respectively. If they all try to solve the problem then find the probability that exactly one of them will solve the problem.

You are given three solutions A,B and C. the pH values of the solutions are 4.5, 7.0 and 10.0 respectively? Which of these is acidic?

You are given three solutions A,B and C. the pH values of the solutions are 4.5, 7.0 and 10.0 respectively? Which of these is basic?

The probability that a student will receive an A, B, C or D grade is 0.40, 0.35, 0.15 and 0.10 respectively. Find the probability that a student will receive : B or C grade.

The probability of A and B achieving a target is 4/5 and 2/3 respectively. If both of them try then find the probability that at least one of them \viii achieve the target.

The probability of A and B achieving a target is 1 /2 and 3/5 respectively. If both of them try then find the probability that at least one of them will achieve the target.