A computer salesperson knows from his past experience that he sells computers to one in every twenty customers who enter the showroom. What is the probability that he will sell a computer to exactly two of the next three customers?

A salesman has a 70% hance to sell a product to any customer.The behaviour of successive is the customers is independent.If two customers A and B enter,what is the probability that the salesman will sell the product to customer A or B (A) 0.95 (B) 0.91 (C) 0.70 (D) 0.49

The probability that a student selected at random from class will pass in Mathematics is 4/5, and the probability that he/she passes in Mathematics and Computer Science is.What is the probability that he/she will pass in computer science if it is known that he/she has passed in Mathematics?

The probability that a student selected at random from class will pass in Mathematics is 4/5, and the probability that he/she passes in Mathematics and Computer Science is ½. What is the probability that he/she will pass in Computer Science if it is known that he/she has passed in Mathematics?

The probability that a student selected at random from class will pass in Mathematics is 4/5, and the probability that he/she passes in Mathematics and Computer Science is 1/2 . What is the probability that he/she will pass in Computer Science if it is known that he/she has passed in Mathematics?

A doctor claims that 60% of the patients he examines are allergic to some type of weed.what is the probability that (i) Exactly three of his next four patients are allergic to weeds.

A milkman brings 100 litres pure milk from a dairy farmer and he sells 10 litres of it to the first customer, then he refills his vessel by adding 10 litres water. After this, he proceeds to the next house and sells 10 litres of it to the second customer and then he refills his vessel again by adding 10 litres of water. Thus every time he sells 10 litres of milk-pure or impure - he keeps on replacing it with 10 litres of pure water. Maximum how many customers can get at least 50% milk in the mixture that they purchase from this milkman?

In a certain town, 40 % residents have computers, 25 % have internet connections and 15 % have both computer and internet connection. A resident is selected at random from the town. Then (i) If he has a computer, then what is the probability that he has internet connection also ? (ii) If he has an internet connection, then determine the probability that he does not have a computer.

The probability that a man who is 45 years old will be alive till he becomes 70 is 5/12 . The probability that his wife who is 40 years old will be alive till she becomes 65 is 3/8 . What is the probability that, 25 years hence, : exactly one of them will be alive.