Hssc i objective ch 7 no 4
- 1. PAKTURK Success is a ladder you cannot climb with your hands in your pockets 1 For more news and updates visit pakturkmaths.com CLASS XI For any question mail us at info@pakturkmaths.com Composed by Engin Baştürk FEDERAL BOARD TYPE Objective Permutation, Combination and Probability No 4 Q1: c P A is equal to: A) P A B) 1P A C) 1P A D) 1 P A Q2: If 1,2,3,4,5,6S then probability of an event A which denotes numbers less than 4 is: A) 1 3 P A B) 1 2 P A C) 3 4 P A D) None of these Q3: The probability that a three digit number taken at random is divisible by 5 is: A) 1/4 B) 11/5 C) 3/4 D) 1/5 Q4: If three coins are tossed, then what is the number of elements in the sample space? A) 90 B) 6 C) 8 D) 10 Q5: How many distinct permutations of the letter ENGIN are possible? A) 24 B) 120 C) 100 D) 96 Q6: The number of comities of 7 persons formed from a group of 10 persons is: A)130 B) 720 C) 120 D) 900 Q7: A dice is thrown, then the probability to get a number divisible by 2 is: A) 2/3 B) 1/3 C) 1/2 D) 3/5 Q8: How many distinct words are possible of the letters in the word “PULLY”? A) 50 B) 60 C) 120 D) 0 730 Q9: 3 ! ? 2 ! n n A) 2 !n B) 3 !n C) 3n D) 1n Q10: 2 1 ?n n n A) !n B) 2 !n C) 1 ! 2 ! n n D) 2 ! 1 ! n n
- 2. PAKTURK Success is a ladder you cannot climb with your hands in your pockets 2 Q11: 1 ? 4.3.2.1 n n A) !n B) 4! 2 ! ! n n C) ! 4! 2 ! n n D) 2 ! 4! ! n n Q12: 10.9.8.7.6 ? A) 10! 5! B) 10! 5! C) 10! 5! D) 5! 10! Q13: 8.7.6 ? 3.2.1 A) 8! 3!5! B) 5!3! 8! C) 10! 2!8! D) 10! Q14: 3 . 2 . 1 ........3.2.1 ?n n n A) !n B) 1 !n C) 3 !n D) 3 ! 3!n Q15: 5 persons can be seated at a round table in: A) 25 ways B) 24 ways C) 20 ways D) 120 ways Answer Key 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20