Скачать или смотреть CAT Permutation Probability Combination (part 1) - #8

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Questions:

Q.1 How many 6 digit numbers exist comprising only the digits 2 and 4 such that they are multiplies of 12? - 1:37

Q.2 How many 4 digit numbers have the product of their digits equal to 48? - 8:20

Q.3 In how many ways can we re-arrange the letters of the word "APTITUDE" such that no two vowels are next to each other? - 15:29

Q.4 A die is rolled thrice, what is the probability that the product of the three rolls is greater than 100? - 19:54

Q.5 If a class has 5 students, what is the probability that no two are born on the same day of the week? - 26:18

Q.6 How many scalene triangles with integer sides exist such that the product of two of the sides is 12? - 28:55

Q.7 In how many ways can we select three cards from a pack of cards such that all three belong to different suits? - 33:00

Q.8 Set A has all factors of 1080. Set B has all factors of 2800. How many elements are present in A U B? - 37:12

Q.9 How many integral factors of 720 are not factors of 2310? - 41:05

Q.10 A tosses a coin 11 times. What is the probability there will be more heads than tails? - 44:16

Q.11 In how many ways can we arrange the letters of the word TWO-IIM such that no two vowels are together? - 46:30

Q.12 (x-2)(x-4)(x-6)(x-8)(x-10) …. (x-100)＜ 0.How many integer values can x take? - 49:17

Q.13 SET S = {1, 2, 3, 4, …. 12}. How many non-empty subsets of set S exist such that the product of the elements of the subset is an even number? - 55:32