1. | If ^{n1+n}^{2} P_{2} = 132, ^{n1-}^{n2}P_{2} = 30 then, |
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2. | is equal to Options: A. B. C. D.None of these |
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3. | If ^{n}c10 = ^{n}c_{14}, then is |
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4. | is equal to Options: A. B. C. D.None of these |
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5. | The number of ways in which 8 sweats of different sizes can be distributed among 8 persons of different ages so that the largest sweat always goes to be younger assuming that each one of then gets a sweat is |
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6. | The number of ways in which the letters of the word DOGMATIC can be arranged is |
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7. | If 50 different jewels can be set to form a necklace then the number of ways is Options: A. B. C.49! D.None of these |
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8. | The number of even numbers greater than 300 can be formed with the digits 1, 2, 3, 4, 5 without repetion is |
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9. | A person has 8 friends. The number of ways in which he may invite one or more of thai to a dinner is. |
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10. | The number of straight lines obtained by joining 16 points on a plane, no twice of them being on the same line is |
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11. | The number of ways in which 7 girls form a ring is |
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12. | The ways of selecting 4 letters from the word EXAMINATION is |
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13. | Options: A. B. C. D.None of these |
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14. | If . ^{n}P_{3}: ^{n}P_{2} =3:1, then n is equal to |
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15. | The number of permutations of 10 different things taken 4 at a time in which one particular thing never occurs is |
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16. | The letters of the words CALCUTTA and AMERICA are arranged in all possible ways. The ratio of the number of there arrangements is |
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17. | In ^{n}P_{r ,}n is always |
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18. | 8 points are marked on the circumference of a circle. The number of chords obtained by joining these in pairs is |
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19. | can be written as Options: A. B. C. D.None of these |
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20. | The number of ways in which 9 things can be divided into twice groups containing 2, 3, and 4 things respectively is |
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