Answer to Question #233848 in Discrete Mathematics for Captain 02

Question

A) The probability that a free-lancer gets an electric contract is 2/7 and that of his getting a plumbing

contract is 3/5. If the probability of his getting at least one of the contracts is 5/7. What is the

probability of his getting both the contract?

B) Of 150 students, 90 girls and 60 are boys, 60 of the Girls and 30 of the boys read story book daily. A

student is selected at random from the lot. What is the chance that selected would be a Boy or read

story book. .

C) In how many ways can a cricket eleven be chosen out of 15 players? How many of them will

i. Include 3 particular player. ii. Exclude 4 particular player.