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 ndigit number is a positive number with exactly n digits. Nine hundred distinct ndigit 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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