How many numbers between 400 and 1000 can be formed with digits 0,2,3,4,5 and 6, if no digit is repeated in the same number?
60
120
240
300
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!
In a party , 12 persons are to be arranged in a round table. If two particular persons are not to sit side by side, then the total no. of arrangements is
9 x 10!
2 x 10!
45 x 8!
10!
If 10Pr = 9P5+5. 9P4, then the value of r is
2
3
5
8
The no. of ways of answering 5 objective type questions, when each question has 4 choices , is
16
256
1024
29
30
31
32
In how many ways can 4 boys and 3 girls be seated in a row of 7 chairs, if the boys and girls have to sit alternate?
80
144
288
The no. of distinct permutations of the letters of the word 'STATISTICS' that begins and end with the letter 'S' is
5040
4280
3360
1680
In how many ways (with or without meaning) a word of three alphabets of English language can be arranged if repetition is not allowed?
78
1500
6000
15600
How many three -letter words can be formed from the alphabets a, b, c, d and e, if repetition is not allowed?
25
100
