IIT JEE Questions And Answers :: Permutations Combinations: part1



IIT JEE : Permutations Combinations QUESTIONS AND ANSWERS :: part1 : 16 to 20

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2014 examinations :

16.If the permutations of A,B,C,D,E taken all together be written down in alphabetical order as in dictionary and numbered, then the rank of the permutation DEBAC is

90
91
92
93

17.Six points in a plane be joined in all possible ways by indefinite straight lines and if no two of them be coincident or parallel and no three pass through the same point(with the exceptions of the original 6).The number of distinct points of intersection is equal to

105
45
51
None of these

18.Out of 8 sailors on a boat, 3 can work only on one side and 2 only on the other side. The number of ways the sailors can be arranged on the boat is

1700
1720
1728
1736

19.An n-digit number is a positive number with exactly n digits. Nine hundred distinct n-digit numbers are to be formed using only the three digits 2,5 and 7.The smallest value of N for which this is possible is

6
7
8
9

20.In an examination, there are three multiple choice questions and each question has 4 choices. Number of sequences in which student can fail to get all answers correct is

11
15
80
63

More Permutations Combinations QUESTIONS AND ANSWERS available in next pages

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