Recent questions tagged permutations

There are 7 identical black balls and 4 identical white balls. In how many ways can they be arranged in a row so that no two white balls are adjacent?

asked Sep 5, 2013 by rvidyagovindarajan_1

1 answer

The no. of ways in which 8 different flowers can be strung to form a garland so that 4 particular flowers are not separated is?

asked Sep 4, 2013 by rvidyagovindarajan_1

1 answer

Different words are formed using the letters of the word 'INTEGER'. If out of these words, $x$ is number of words in which $I\:and\:N$ are never together and $y$ is no. of words which begin with I and end with R, then $\large\frac{x}{y}=?$

asked Sep 3, 2013 by rvidyagovindarajan_1

1 answer

The number of numbers that can be formed by using digits 1,1,2,2,3,3,4, so that the odd digits always occupy odd places is?

asked Sep 3, 2013 by rvidyagovindarajan_1

1 answer

The no. of ways in which 10 students $A_1,A_2,.....A_{10}$ can be ranked so that $A_1$ is above $A_2$ is ?

asked Sep 3, 2013 by rvidyagovindarajan_1

1 answer

A coin is tossed 6 times In how many ways we can get the $3^{rd} $ head in the $5^{th}$ toss?

asked Sep 3, 2013 by rvidyagovindarajan_1

1 answer

The number of 4 digit numbers divisible by 3 that can be formed by 4 different even digits (0,2,4,5,6,8) is ?

asked Sep 3, 2013 by rvidyagovindarajan_1

1 answer

Ten persons are to speak in a meeting. The no. of ways in which this can be arranged if A wants to speak before B and B wants to speak before C, is ?

asked Aug 27, 2013 by rvidyagovindarajan_1

1 answer

In how many ways can 3 girls and 9 boys can be seated in two vans having 3 numbered seats in the front and 4 numbered seats at the back so that the 3 girls are to be seated together in the back row?

asked Aug 20, 2013 by rvidyagovindarajan_1

1 answer

The sum of the digits in unit place of all the numbers formed using 3,4,5,6 taking all at a time is?

asked Aug 15, 2013 by rvidyagovindarajan_1

1 answer

The number of signals that can be formed using 6 flags of different colours taking 1 or more flags at a time is ?

asked Aug 14, 2013 by rvidyagovindarajan_1

1 answer

How many three digit numbers that are divisible by 3 can be formed using the digits 0,1,2,3,4,5 without repeating the digits?

asked Aug 14, 2013 by rvidyagovindarajan_1

1 answer

How many 9 digit numbers can be formed from the numbers 223355888 so that the odd digits occupy even positions.

asked Aug 14, 2013 by rvidyagovindarajan_1

1 answer

The no. of 7 digit numbers that can be formed using the digits $1,2,3,2,3,3,4$ is?

asked Aug 13, 2013 by rvidyagovindarajan_1

1 answer

The no. of ways in which 6 persons can be seated in a circular table so that two particular persons are never together is?

asked Aug 13, 2013 by rvidyagovindarajan_1

1 answer

The no. of ways in which 6 men and 5 women can sit at a round table so that no two women sit together is?

asked Aug 13, 2013 by rvidyagovindarajan_1

1 answer

1.1! + 2.2! + 3.3! + ......... + n.n! = ?

asked Aug 13, 2013 by rvidyagovindarajan_1

1 answer

What is the 7th word in the arrangement of the permuted words formed by the letters of the word 'SWISS' as per the alphabetical order as in dictionary?

asked Aug 12, 2013 by rvidyagovindarajan_1

1 answer

The no. of arrangements of the letters of the word 'BANANA' in which the 2 $N^s$ do not come adjacently is?

asked Aug 12, 2013 by rvidyagovindarajan_1

1 answer

The letters of the word 'COCHIN' are permuted and all the permutations are arranged in alphabetical order as in Dictionary. The no. of words that appear before the word 'COCHIN' is?

asked Aug 12, 2013 by rvidyagovindarajan_1

1 answer

The number of seven digit integers whose sum of the digits is ten, formed by using the digits 1, 2 and 3 only is

asked Aug 9, 2013 by rvidyagovindarajan_1

1 answer

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