(6)n. The coinUl, what is the probability that it was taken out fromth

1.	(6)n. The coinUl, what is the probability that it was taken out fromthe first purse.(Ans. 19/42,7/19)The probability that A can solve a problem is 4/5; that B can solve it is 2/2and that C can solve it is 3/7. If all of them try independently, find theprobability that the problem will be solved.(Ans. 101/105)A construction company is bidding for two contracts P and Q. Theprobability that the company gets the contract P is 3/7, and the probabilitythat it gets the contract Q is 5/9. The probability of the company gettingboth the contracts is 1/8. What is the probability that the company gets atleast one contract?(Ans. 433/504)(7)(8)The probability that a contractor gets an electric contract is 2/7, and that ofhis getting a plumbing contract is 3/5. If the probability of his getting atleast one of the contracts is 5/7, what is the probability of his getting boththe contracts?(Ans. 6/35)
Answer» 6)You need to find the probability that at least one of them solve the problem. This is equal to, = 1 - probability that none will solve. Because they will only fail when none of the A B C will solve problem. In other cases problem will be solved. Probability that no one solve := [1-(4/5)]x [1-(2/3)] x [1-(3/7)]= 4/105 So the answer is = 1-(4/105) = 101/105 8) Probability that he is getting both contracts = prob. ELE * prob. PLU = (2/7)*(3/5) = 6/35 bacchon ko darane ke liye

(6)n. The coinUl, what is the probability that it was taken out fromthe first purse.(Ans. 19/42,7/19)The probability that A can solve a problem is 4/5; that B can solve it is 2/2and that C can solve it is 3/7. If all of them try independently, find theprobability that the problem will be solved.(Ans. 101/105)A construction company is bidding for two contracts P and Q. Theprobability that the company gets the contract P is 3/7, and the probabilitythat it gets the contract Q is 5/9. The probability of the company gettingboth the contracts is 1/8. What is the probability that the company gets atleast one contract?(Ans. 433/504)(7)(8)The probability that a contractor gets an electric contract is 2/7, and that ofhis getting a plumbing contract is 3/5. If the probability of his getting atleast one of the contracts is 5/7, what is the probability of his getting boththe contracts?(Ans. 6/35)

Answer»

6)You need to find the probability that at least one of them solve the problem.

This is equal to, = 1 - probability that none will solve.

Because they will only fail when none of the A B C will solve problem. In other cases problem will be solved.

Probability that no one solve := [1-(4/5)]x [1-(2/3)] x [1-(3/7)]= 4/105

So the answer is = 1-(4/105) = 101/105

8) Probability that he is getting both contracts = prob. ELE * prob. PLU = (2/7)*(3/5) = 6/35

bacchon ko darane ke liye