Recent questions tagged permutation

4 votes
1 answer
1
The number of ways of arranging 10 books on a shelf such that 2 particular books are always together is
4 votes
3 answers
2
How many 3 letter words can be formed from word PRACTICES?
3 votes
1 answer
3
How many ways $10$ roses can be distributed among $3$ girls?
2 votes
1 answer
4
Choose the correct option: Boxes numbered $1, 2, 3, 4$ and $5$ are kept in a row, and they are to be filled with either a red or a blue ball, such that no two adjacent boxes can be filled with blue balls. How many different arrangements are possible, given that all balls of a given colour are exactly identical in all respects? $8$ $10$ $15$ $22$
2 votes
1 answer
5
A man has nine friends, four boys and five girls. In how many ways can he invite them, if there have to be exactly three girls in the invitees? $320$ $150$ $80$ $200$
1 vote
1 answer
6
Out of 100 students, 10 students used to drink milk(M), coffee(C) and Tea(T); 20M and C; 30C and T; 25M and T; 12M only; 5C only and 8T only. The number of students who did not drink any of this is a) 18 b) 24 c) 20 d) 16
0 votes
1 answer
7
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 ?
0 votes
1 answer
8
In how many ways 8 persons can be arranged on two round tables consisting of 4 chairs each? a)720 b)1260 c)2520 d)5040
0 votes
1 answer
9
An advertising board is to be designed with 5 vertical stripes using some or all of colors red, yellow and orange. In how many ways board can be designed such that no two adjacent stripes have same color? a)6 b)15 c)18 d)48
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