Aptitude Questions and Answers for PLACEMENTS

Ques. Out of 7 consonants and four vowels ,how many words of three consonants and 2 vowels can be formed?
Op 1: 210
Op 2: 1050
Op 3: 25200
Op 4: 21400
Op 5: none of these
Correct Op : 3


Ques. 3 books of mathematics and 5 books of physics are placed on a shelf so that the books on the same subject always remain together .The possible arrangements are .
Op 1: 1440
Op 2: 1956
Op 3: 720
Op 4: none of these
Op 5:
Correct Op : 1


Ques. The number of possible selections of one or more questions from 8 given questions, each question having an alternative, is
Op 1: 28-1
Op 2: 38-1
Op 3: 48-1
Op 4: none of these
Op 5:
Correct Op : 2