Class XII Two dice are tossed. The probability that the total score is a prime number is: 1 6 5 12 1 2 7 9 A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability that the ball drawn is white? 3 4 4 7 1 8 . 3 7 Find the mean number of heads in three tosses of a fair coin. 1.2 1.0 1.5 1.4 From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings? 1 15 25 57 35 256 1 221 A bag contains 4 white, 5 red and 6 blue balls. Three balls are drawn at random from the bag. The probability that all of them are red, is: . 1 22 3 22 2 91 2 77 Do you really want to submit this quiz? Cancel Submit Quiz