The probability of winning of a person is 6/11 and at a result he gets Rs. 77 The expectation of this person is

In the box there are a white and b black balls. Two persons A and B takes ball one after the other and each time ball is placed back in box. Person A starts the game. If white ball is obtained then person A wins the game probability of winning game by person A is double then the winning probability of person B. Then a : b = .........

The ratio of income and expenditure of a person is 11 : 10. If he saves Rs. 9,000 per annum, his monthly income is

The probability that a person will win a game is (2)/(3) and the probability that he will not win a horse race is (5)/(9) . If the probability of getting in at least one of the events is (4)/(5) ,what is the probability that he will be successful in both the events ?

A person throws two fair dice. HE wins ₹ 15 for throwing a doublet (same numbers on the two dice), wins ₹ 12 when the throw results in the sum of 9, and losses ₹ 6 for any other outcome on the throw. Then, the expected gain/loss (in ₹) of the person is

A person throws two fair dice. HE wins ₹ 15 for throwing a doublet (same numbers on the two dice), wins ₹ 12 when the throw results in the sum of 9, and losses ₹ 6 for any other outcome on the throw. Then, the expected gain/loss (in ₹) of the person is

A person throws two pair dice. He wins Rs. 15 for throwing a doublet (same numbers on the two dice), wins Rs. 12 when the throw results in the sum of 9, and loses Rs.6 for any other outcome on the throw. Then the expected gain/loss (in Rs.) of the person is:

The probability that a person will get an electric contact is (2)/(5) and the probability that he will not get plumbing contract is (4)/(7). If the probability of getting at least one contract is (2)/(3), what is the probability that he will get both.

The probability that a person will get an electric contact is 2/5 and the probability that he will not get plumbing contract is 4/7 . If the probability of getting at least one contract is 2/3 , what is the probability that he will get both.

The probability that a person will get an electric contract is 2/5 and the probability that they will not get plumbing contracts 4/7dot if the probability of getting at least one contract is 2/3 , what is the probability that he will get both?

A person throws two pair dice.He wins Rs.15 for throwing a doublet (same numbers on the two dice),wins Rs.12 when the throw results in the sum of 9, and loses Rs.6 for any other outcome on the throw.Then the expected gain/loss (in Rs.) of the person is: