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 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 fair coin is tossed repeatedly. If head and tail appear alternatively on first 7 tosses, then the probability that head appears on the eighth toss is

A purse contains 3 coins C_(1), C_(2), C_(3) . Where C_(1) is a fair coin, C_(2) is a biased coin with probability (2)/(3) of showing up head and C_(3) is a fake coin containing head on both sides. One of the coins is selected at random and tossed twice. If head is obtained on both the tosses, then the probability that the coin selected is not a fair coin is p. Then p =

In a set of 10 coins,2 coins are with heads on both the sides.A coin is selected at random from this set and tossed five xx.If all the five xx,the result was heads,find the probability that the selected coin had heads on both the sides.

If a fair coin is tossed 8 times , then the probability that it shows heads larger number of times than tails is

A fair coin is tossed three times . The probability that there is atleast one tail 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