A man alternately tosses a coin and throws a die beginning with the coin. The probability that he gets a head in the coin before he gets a 5 or 6 in the dice is 3//4 b. 1//2 c. 1//3 d. none of these
A fair coin is tossed 10 times. The probability of getting exactly 6 heads is -
A fair coin is tossed 2n times. The change that number of times one gets head is not equal to the number of times one gets tail is
A box contains N coins, m of wiich are fair and the rest are biased. The probability of getting a head when a fair coin is tossed is 1/2, while it is 2/3 when a biased coin is tossed. A coin is drawn from the box at random and is tossed twice. The first time it shows head and the second time it shows tail. What is the probability that the coin drawn is fair ?
A fair coin is tossed n times. The probability of getting head at least once is greater than 0.8. Then the least value of n is -
A fair coin is tossed a fixed number of times. If the probability of getting exactly 3 heads equals the probablity of getting exactly 5 heads, then the probability of getting exactly one head is-
In a game called odd man out m(m >2) persons toss a coin to determine who will buy refreshments for the entire group. A person who gets an outcome different from that of the rest of the members of the group is called the odd man out. The probability that there is a loser in any game is (A) 1/(2m) (B) m/2^(m-1) (C) 2/m (D) none of these
A and B toss a coin alternately untill one of them gets a head for the first time and wins the toss. If A begin, find the respective probability ties for A and B to win the toss.
