A person can kill a bird with probability 3/4. He tries 5 times. What is the probability that he may not kill the bird?

The probability that a certain person will buy a shirt is 0.2, the probability that he will buy a trouser is 0.3, and the probability that he will buy a shirt given that he buys a trouser is 0.4. Find the probability that he will buy both a shirt and a trouser. Find also the probability that he will but a trouser given that he buys a shirt.

The probability that a man can hit a target is 3//4 . He tries 5 times. The probability that he will hit the target at least three times is

In answering a question on a multiple choice test, a student either knows the answer or guesses. Let 3/5 be the probability that he knows the answer and 2/5 be the probability that he guesses. Assuming that a student who guesses at the answer will be correct with probability 1/3 , what is the probability that the student knows the answer given that he answered it correctly

In answering a question on a multiple choice test, a student either knows the answer or gusses. Let 3/4 be the probability that he knows the answer and 1/4 be the probability that he gusses. A ssuming that a student who gusses and the answer will be correct with probability 1/4 What is the probability that the studentthe answer given that he answered it correctly?