A purse contains 5 coins, each either a fifty-paisa coin or one-rupee coin. Two coins are drawn at random and are found to be one-rupee coins. Find the expected (probable) total value of the remaining coins.

A bag contains 10 coins of which at least 2 are one-rupee coins. Two coins are drawn and both are found to be not one-rupee coins. What is the probability of the bag to contain exactly 2 one-rupee coins?

A purse contain n coins of unknown values.a coin is drawn from it at random and is found to be a rupee.Then the chance that it is the only rupee coin in the purse is

A purse contains 3 silver and 6 copper coins a second purse contains 4 silver and 3 copper coins.If a coin is drawn at random from one of the two purses,find the probability that it is a silver coin.

There are two pockets in a purse. First pocket contains 3,50 paise coin and 2, one rupee coins while second pocket contains 2,50 paise coins and 3, one rupee conis. Find the probability of getting a one rupee coin.

Two coins (a one rupee coin and a two rupee coin) are tossed once.Find a sample space.

A purse contains three 10 paise, three 50 paise and ten 1 rupee coins. If three coins are selected at random, then the probability that the total amount is 2 rupee is

If three one rupee coins can be placed around a ten-paise coin such that each one rupee coin touches the ten paise coin as well as the other two one-rupee coins,the ratio of the radii of the one rupee and ten paise coin is:

A purse contains 10 ten rupee coins and 5 five rupee coins. Two coins are randomly drawn. If the expected value of 2 drawn coins is lambda , then (9lambda)/(4) is equal to

A box contains 2 fifty paise coins, 5 twenty five paise coins and a certain fixed number n (ge2) of ten and five paise coins. Five coins are taken out of the box at random. Find the probability that the total value of these 5 coins is less than one rupee and fifty paise.