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Fundamental Principle Of Counting Free Doubts and Solutions

CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

number of ways of selecting pair of black squares in chessboard such that they have exactly one common corner is equal to ______________  

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

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CBSE - XI Science - Mathematics - Permutations and Combinations

How many numbers are there between 100 and 1000 in which all the digits are distinct?

Asked by Topperlearning User 12th September 2016, 11:52 PM
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CBSE - XI Science - Mathematics - Permutations and Combinations

How many words (with or without meaning) of three distinct letters of the English alphabets are there?

Asked by Topperlearning User 24th November 2015, 12:14 PM
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CBSE - XI Science - Mathematics - Permutations and Combinations

There are three groups of men in a company having 4, 5 and 6 members respectively. Two men have to be selected from the same group as President and Vice-President of a committee to be formed. Find the number of ways in which such a selection can be made.

Asked by Topperlearning User 13th November 2015, 5:08 PM
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CBSE - XI Science - Mathematics - Permutations and Combinations

How many four digit numbers can be formed using the digits 0,1,2,3,4,5 if 1)     repetition of digits is not allowed? 2)     repetition of digits is allowed?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Mathematics - Permutations and Combinations

How many numbers are there between 100 and 1000 which have exactly one of their digits as 7?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Mathematics - Permutations and Combinations

In how many ways 5 rings of different types can be worn in 4 fingers?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Mathematics - Permutations and Combinations

A mint prepares metallic calendars specifying months, dates and days in the form of monthly sheets (one plate for each month). How many types of February calendars should he prepare to serve for all the possibilities in the future years?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Mathematics - Permutations and Combinations

How many three digit odd numbers can be formed by using the digits 1,2,3,4,5,6 If:  1) the repetition of digits is not allowed?       2) the repetition of digits is allowed?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Mathematics - Permutations and Combinations

A room has 5 doors. In how many ways can a man enter the room through one and come out through a different door?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Mathematics - Permutations and Combinations

In a class there are 27 boys and 15 girls.  The teacher wants to select a boys and a girl for the monitor ship of the class.  In how many ways can the teacher make this selection?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Mathematics - Permutations and Combinations

what is the value of P(6,4)

Asked by BHAVYA PREETI 2nd June 2014, 11:26 AM
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