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!
None of these
The number of handshakes that can be exchanged among a party of 12 students if every student strikes hands
once with every other student is _________.
P ( 12, 2 )
P ( 12, 10 )
C ( 12, 2 )
In how many ways 6 gentlemen and 3 ladies can be seated round a table So that every gentleman may have a lady by his side.
720
1440
1880
1040
The number of selections of 2 candidate for a post out of 5 equally qualified candidates.
P ( 5, 2 )
5 !
( 5 - 2 ) !
10
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
The number of diagonals that can be drawn by joining the angular points of a heptagon are
7
14
21
28
The number of lines drawn through 6 points lying on a circle is ______
12
15
24
30
The possible out comes when a coin is tossed five times.
25
5/2
The number of diagonals that can be drawn by joining the angular points of a polygon of 20 sides are
190
210
20
170
