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 possible out comes when a coin is tossed five times.
25
52
10
5/2
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 )
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
The number of diagonals that can be drawn by joining the angular points of a polygon of 20 sides are
190
210
20
170
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 distinct positive divisors of 22 32 53 is _______.
36
72
144
If nc2 = nc3 , then the value of nc4 is ________.
2
3
4
5
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
How many 10 digits number can be written by using the digits 1 and 2.
10 C1 +9 C2
2 10
10C1
10 !