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 CBSE Guess > Papers > Important Questions > Class XI > 2007 > Maths > Mathematics By Mr. Vishnoo Prashanth CBSE CLASS - XI
Q. 1. The number of different permutations of the letters of the word HOLIDAY is: 256 5040 2520 720 Q. 2. The number of three digit even numbers than can be formed out of the digits 0 to 9 are: 240 120 360 288 Q. 3. If n=7 and r=3 then the value of the expression n! / (n-r+1)! is: 24 42 18 7 Q. 4. The number of hand shakes in a room is 36 based on the fact that every body shakes hands with everybody else. The number of persons are: 9 8 7 11 Q. 5. The number of ways of selecting 2 players and 3 bowlers from a group of 6 players and 5 bowlers is: 1800 150 200 60 Q. 6. The number of ways in which a face card can be drawn from a pack of 52 cards is: 256 24 4 x 13C4 360 Q. 7. The number of permutations of the MISSISSIPPI when the four S’s come together is: 2520 1250 840 720 Q. 8. 4 flags of different colours are available. The number of possibilities of arranging all possible signals provided each signal requires the use of 2 flags one below the other is: 24 120 12 48 Q. 9. An examination paper consists of 7 questions, 4 in part A and 3 in part B. A student has to attempt 5 questions in all, such that he should select at least 2 from each part. The number of ways in which it can be done is: 128 44 72 96 Q. 10. A golf player wants to put the ball in the hole in 5 shots. He says that he will put the ball in the hole at most by 3 shots and will qualify for the next round. The number of possibilities of shots he had played is: 90 85 100 72 Q. 11. The number of ways in which the letters of the word ‘PERMUTATIONS’ can be arranged so that there are exactly four letters between P and S are: 14404200 25401600 30401280 11258600 Q. 12. The odd numbers less than 10,000 that can be formed using the digits 0,2,3,5 allowing repetition of digits are: 196 72 128 256 Q. 13. If the different permutations of the word EXAMINATION are arranged as in a dictionary, the number of words that can be formed before the first word starting with E are: 453600 125600 907200 219600 Q. 14. The number of calendars that can be prepared for the month of February are: 2 7 14 28 Q. 15. The value of r for the expression 8Cr – 7C3 = 7C2 is: 2,6 3,7 4,5 2,5 Q. 16. The number of three letter words that can be made out of the letters of the word ORIENTAL are: 256 336 184 128 Q. 17. There are 15 points in a plane of which 6 are collinear. The number of straight lines that can be drawn through the points are: 91 27 89 45 Q. 18. The number of ways of selecting 4 letters out of all the letters of the word ‘CONSTANT’ is: 256 1120 5040 1680 Q. 19. The number of ways of selecting 11 players from a committee of 15 persons if a particular player is never chosen is: 286 364 244 128 Q. 20. The value of r and n such that 1< r < 8 and such that P(n,r) is a prime number is: r=1, n = 3,5,7,11 r=2, n=2,3,5,7 r=1, n=2,3,5,7 r=2, n=3,5,7,11