| 1. | 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. | 2/5 |
| c. | 8/15 |
| d. | 9/20 |
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Answer: (d).9/20
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| 2. | A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue? |
| a. | 10/21 |
| b. | 11/21 |
| c. | 2/7 |
| d. | 5/7 |
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Answer: (a).10/21
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| 3. | In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green? |
| a. | 1/3 |
| b. | 3/4 |
| c. | 7/19 |
| d. | 8/21 |
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Answer: (a).1/3
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| 4. | What is the probability of getting a sum 9 from two throws of a dice? |
| a. | 1/6 |
| b. | 1/8 |
| c. | 1/9 |
| d. | 1/12 |
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Answer: (c).1/9
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| 5. | Three unbiased coins are tossed. What is the probability of getting at most two heads? |
| a. | 3/4 |
| b. | 1/4 |
| c. | 3/8 |
| d. | 7/8 |
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Answer: (d).7/8
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