1- A problem is given to three students whose chances of solving it are 1/2, 1/3 and 1/4 respectively. What is the probability that the problem will be solved?
| A) 1/4 | B) 1/2 |
| C) 3/4 | D) 7/12 |
2-Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?
| A) 1/2 | B) 3/5 |
| C) 9/20 | D) 8/15 |
3-A bag contains 6 white and 4 black balls .2 balls are drawn at random. Find the probability that they are of same colour.| A) 1/2 | B) 7/15 |
| C) 8/15 | D) 1/9 |
4-Two cards are drawn at random from a pack of 52 cards. What is the probability that either both are black or both are queen?| A) 52/221 | B) 55/190 |
| C) 55/221 | D) 19/221 |
5-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:| A) 2/91 | B) 1/22 |
| C) 3/22 | D) 2/77 |
6-In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize?
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