A regular polygon of n sides has 170 diagonals,then n is equal to
12
17
20
25
C.
20
A committee of 12 members is to be formed from 9 women and 8 men. The number of committees in which the women are in majority is
2720
2702
2270
2278
A student has to answer 10 out of 13 questions in an examination choosing atleast 5 questions from the first 6 questions. The number of choice available to the student is
63
91
161
196