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

In a purse there are 10 coins, all 5 paise except one which is a rupee. In another purse there are 10 coins all 5 paise. 9 coins are taken out from the former purse & put into the latter & then 9 coins aretaken out from the latter & put into the former. Then the chance that the rupee is still in the first purse is: (A) 9/19 (B) 10/19 (C) 4/9 (D) none

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 bag contains 10 coins of which atleast 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.

In a purse there are 10 coins, all shillings except one, which is a sovereign in another purse, there are 10 coins, all shilings. Nine coins are taken from the former purse and put into the latter, and then nine coins are taken from the latter and put into the former. find the chance that the sovereign is still in the first purse.

A purse contains 4 coins which are either sovereigns or shillings 2 coins are drawn and found to be shillings: if these are replaced what is the chance that another drawing will give a sovereign?

A purse contains 6 Silver coins and 3 Gold coins. Another purse contains 4 Silver coins and 5 Gold coins. A purse is selected at random and a coin is drawn from it. It's known that a coin is Gold then what is the probability that a Gold coin is selected from another (II^(nd)) purse?

A purse contains 4 copper and 3 silver coins while another purse contains 6 copper and 2 silver coins. A purse is drawn at random and coin is drawn. Then ....... is the probability that selected coin is of copper.

A purse contains 4 silver and 5 copper coins. A second purse contains 3 silver and 7 copper coins. If a coin is taken out at random from one of the purses, what is the probability that it is a copper coin ?