Out of 7 consonants and 4 vowels, how many words of 3 consonants and 2 vowels can be formed?
210
1050
25200
21400
If nP5 = 60 .n - 1P3 , then n is.
6
15
10
12
In how many ways can a group of 5 men and 2 women be made out of a total of 7 men and 3 women?
63
90
126
45
How many 3-digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9, which are divisible by 5 and none of the digits is repeated?
5
20
P (10 , r ) = 2 P (9 , r ) , r is equal to
2
4
In how many ways a committee, consisting of 5 men and 6 women can be formed from 8 men and 10 women?
266
5040
11760
86400
Ashok, Usha,Rani,Sonu are to give speeches in a class.The teacher can arrange the order of their presentation in.
4 ways
12 ways
256 ways
24 ways
How many 4-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed?
40
400
2520
The number of different four digit numbers that can be formed with the digits 2,3,4,5,7 using each digit only once is.
4!
4 (4!)
5!
5 (7!)
Twelve students compete for a race.The number of ways in which first three places can be taken as.
3!
12 ×11 ×10.
12!/3!
12! - 3
