Permutations and Combinations Questions And Answers.
Exercise ::
Permutations and Combinations
| 1. | Three flags each of different colours are available for a military exercise, Using these flags different codes can be generated by waving. |
| I. Single flag of different colours
II. Any two flags in a different sequence of colours.
III. three flags in a different sequence of colours.
The maximum number of codes that can be generated is. |
| A. | 6 |
| B. | 9 |
| C. | 15 |
| D. | 18 |
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Published by:Michael Daani
| 2. | A question paper consists of five problems, each problem having three internal choices. In how many ways can a candidate attempt one or more problems? |
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| A. | 63 |
| B. | 511 |
| C. | 1023 |
| D. | 15 |
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Published by:Michael Daani
| 3. | In a class there are 20 boys and 25 girls. In how many ways can a boy and a girl be selected? |
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| A. | 400 |
| B. | 500 |
| C. | 600 |
| D. | 20 |
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Published by:Michael Daani
| 4. | In how many ways can three consonants and two vowels be selected from the letters of the word “TRIANGLE”? |
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| A. | 25 |
| B. | 13 |
| C. | 40 |
| D. | 30 |
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Published by:Michael Daani
| 5. | A bag contains nine yellow balls, three white balls and four red balls. In how many ways can two balls be drawn from the bag? |
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| A. | ?C? |
| B. | ³C? |
| C. | ¹?C? |
| D. | ¹²C? |
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Published by:Michael Daani
