A box has 10 coins. Five have heads on both sides. Three have tails on both sides; two are fair. A coin is chosen at random and tossed. Probability that head appears is (A) 4/5 (B) 2/5 (C) 3/5 (D) 1/5

A box has 10 coins.Five have heads on both sides.Three have tails on both sides; two are fair.A coin is chosen at random and tossed Q.If 3 coins are drawn,one by one without replacement,then the probability that the sequence of events is 2 headed,fair,2 tailed is

A bag contains (2n+1) coins.It is known that n of these coins have a head on both sides whereas the rest of the coins are fair.A coin is picked up at random from the bag and is tossed.If the probability that the toss results in a head is (31)/(42) ,determine the value of n.

A bag contains 2n+1 coins.It is know that nn of these coins have a head on both of its sides.Whereas the rest of the coins asew fair . A coin is picked up fat random from the bag and is tossed.If the probablity that the toss results in head is (31)/(42) .find the value of n

A bag contains n+1 coins.If is known that one of these coins shows heads on both sides, whereas the other coins are fair.One coin is selected at random and tossed.If the probability that toss results in heads is 7/12, then find the value of n.

A coin is tossed 5 xx.What is the probability that head appears and even number of xx?

A fair coin is tossed 9 times . Find the probability that it shows heads exactly 5 times .

A box contain three coins: one coin is fair, one coin is two-headed, and one coin is weighted so that the probability of heads, appearing is 1/3 . A coin is selected at random and tossed. Then the probability that heads appears is