The number of lines drawn through 6 points lying on a circle is ______
12
15
24
30
The number of distinct positive divisors of 22 32 53 is _______.
25
36
72
144
The number of diagonals that can be drawn by joining the angular points of a heptagon are
7
14
21
28
P, Q, R, S are to give lectures to an audience. The organizer can arrange the order of their presentation in ______.
4 ways
12 ways
256 ways
24 ways
In how many ways can 7 persons sit around a table.So that all shallnot have the same neighbours in any two
arrangements?
180
260
360
720
How many 10 digits number can be written by using the digits 1 and 2.
10 C1 +9 C2
2 10
10C1
10 !
The number of ways in which 5 women, can draw water from 5 taps, no tap remaining unused is _______.
5 x 5
52
5 !
None of these
In an examination, a student has to answer 4 questons out of 6 questions 1 and 2 are however, compulsary.
The number of ways in which the students can make the choice is _______.
4
C ( 6, 4 )
C ( 6, 2 )
6
How many different arrangements can be made out of the letters in the expansion A2 B3 C4, when written in full ?
2! + 3! + 4!
2 ! 3!
Six identical coins are arranged in a row. The number of ways in which the number of tails is equal to number of heads is _______.
20
120
9
40
