11.A man has 10 coins each of 10 paise denomination. One of the coins is known to have two heads. He takes out one coin at random and tosses it 5 times. If it always falls with head upwards, the probability that it is the double-headed coin, is

12.A and B are two independent events. The probability that both A and B occur is 1/6 and the probability that neither of them occurs is 1/3. Then, the probability of the two events are respectively

13.Three boxes contain respectively 3 white and 1 black, 2 white and 2 black, 1 white and 3 black balls, from each of the boxes one ball is drawn at random. The probability that 2 white and 1 black ball will be drawn, is

14.The odds that a book will be favourable reviewed by 3 independent cirtics, are 5 to 2, 4 to 3 and 3 to 4. The probability that out of the 3, a majority will be favourable, is

15.The probability of India winning a test match ageinst West Indies is 1/2. Assuming independence from match to match, the probability that in an 5 match series, second win of India will occur at the third test, is