Probability-Sample Questions

1.  A coin is tossed 150 times and it is found that head comes 1115 times and tail 35 times. If a coin tossed at random, what is the probability of getting

      (i) a head                        (ii) a tail

2.  A bag-I contains four cards numbered 1, 3, 5 and 7 respectively. Another bag-II contains here cards numbered 2, 4 and 6 respectively. A card is drawn at random from each bag. Find the probability that the sum of two cards drawn is 9.

3.  A bag contains 7 white, 3 red and 4 black balls. A ball drawn at random. Find the probability that it is a red or a black ball.

4.  In a single throw of two dice, find the probability of getting a total of 8.

5.  One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting a face card.

6.  Two unbiased coins are tossed once. What is the probability of getting exactly one head?

7.  What is the probability of a sure event?

8.  How many faces a common die has?

9.  When a die is thrown once, what can be the greatest possible score?

10.  If two dice are thrown together, then what must be the greatest possible score?