UPSC Government Jobs Exams

In an examination, there are three subjects A, B and C. A student has to pass in each subject. 20% students failed in A, 22% students failed in B and 16% failed in C. The total number of students passing the whole examination lies between [UPSC 2009(CS-P)]

1) 42% and 84%
2) 42% and 78%
3) 58% and 78%
4) 58% and 84%

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UPSC Other Question
In a tournament 14 teams play league matches. If each team plays against every other team once only then how many matches are played? [UPSC 2010 (CS-P)]
a) 105
b) 91
c) 85
d) 78 In how many ways can four children be made to stand in a line such that two of them, A and B are always together? [UPSC 2010 (CS-P)]
a) 6
b) 12
c) 18
d) 24