The number of words formed with the letters of PATALIPUTRA without changing the order of the vowels and consonants
1200
1350
2400
3600
In how many ways 7 men and 7 women can sit on a round table such that no two women sit together?
(7!)2
6! x 7!
7 x (6!)2
7!
How many numbers can be formed with digits 1,2,3,4,3,2,1 .So that odd digits always occupy the odd places?
6
18
20
24
The no. of 5 digit numbers that can be formed with the digits 0,1,2,3,4 if the numbers can be repeated in the same number is
25
250
2500
12500
An electrical device can be minor defective in 10 ways and major defective in 8 ways. In how many ways 2 major and 2 minor defects can occur?
5040
1260
164
80
If 56 P (r+6): 54 P (r+3) =30800: 1, then the value of r is
40
41
42
43
A guard of 12 men is formed from a group of n soldiers in all possible ways. If the number of times two particular soldiers A and B are together on guard is thrice the number of times three particular soldiers C,D,E are together on guard, then n is equal to
32
36
A room has 6 doors. The no. of ways, in which a man can enter the room through one door and come out through a different door, is
12
30
The number of positive integer solution (x,y,z) of the equation x y z = 24 is