18
16
12
-10
/
7
8
9
10
In if the ratio of term from the beginning to the term from the end is , then ____.
None of the above
/
If the coefficients of terms of are in A.P., then r = ____.
6
7
8
9
/
For a scholarship, at the most n candidates of 2n+1 can be selected, if the number of different ways of selection of at least one candidate is 63, the maximum number of candidates that can be selected for the scholorship is
3
4
6
5
Ten points are marked on a straight line and 11 points are marked on another straight line. How many triangles can be constructed with vertices from among the above points?
495
550
1045
2475
The figure below shows the network connecting cities A, B, C, D, E and F. the arrows indicate permissible direction of travel. What is the number of distinct paths from A to F?
9
10
11
None of these
In a chess competition involving some boys n girls of a school, every student had to play exactly one game with every other student. It was found that in 45 games both the players were girls and in 190 games both were boys. The number of games in which one player was a boy and the other was a girl is
200
216
235
256