1. | The sum of all 4 digit number containing the digits 2, 4, 6, 8, without repetitions is |
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2. | The value of Options: A. B.-1 C.+1 D.None of these |
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3. | is equal to |
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4. | Every two persons shakes hands with each other in a party and the total number of hand shakes is 66. The number of guests in the party is |
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5. | In a group of boys the number of arrangement of 4 boys is 12 times the number of arrangements of 2 boys.The number boys in the group is |
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6. | is evaluated as |
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7. | If ^{n} c_{r-1} = 56, = 28 and ^{n} c_{r+1} = 8, then r is equal to |
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8. | The number of 4 digit numbers formed with the digits 1, 1, 2, 2, 3, 4 is |
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9. | In ^{n}P_{r ,}n is always |
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10. | In ^{n}P_{r}, the restriction is Options: A.n > r B. C. D. None of these |
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11. | 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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12. | The number of ways in which 8 different beads be strung on a necklace is |
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13. | If ^{n1+n}^{2} P_{2} = 132, ^{n1-}^{n2}P_{2} = 30 then, |
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14. | The number of ways the letters of the word "Triangle" to be arranged so that the word 'angle' will be always present is |
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15. | The number of ways in which 15 mangoes can be equally divided among 3 students is Options: A. B. C. D.None of these |
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16. | 10 examination papers are arranged in such a way that the best and worst papers never come together. The number of arrangements is |
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17. | is equal to Options: A. B. C. D.None of these |
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18. | There are 10 trains plying between Calcutta and Delhi. The number of ways in which a person can go from Calcutta to Delhi and return by a different train is |
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19. | The results of 8 matches (Win, Loss or Draw) are to be predicted. The number of differe forecasts containing exactly 6 correct results is |
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20. | ^{n}P_{r} can also written as Options: A. B. C. D.None of these |
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