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Number of ways in which 15 different books can be arranged on a shelf so that two particular books shall not be together is

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Important Questions on Permutations and Combinations

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Gamma Question Bank for Engineering Mathematics>Chapter 7 - Permutations and Combinations>Assignment>Q 16
How many 6 digit numbers can be formed out of the digits of the number 113226?
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Gamma Question Bank for Engineering Mathematics>Chapter 7 - Permutations and Combinations>Assignment>Q 17
Number of three digit numbers such that atleast one of the digits is 9, repetitions allowed, is
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Gamma Question Bank for Engineering Mathematics>Chapter 7 - Permutations and Combinations>Assignment>Q 18
Number of ways in which the letters of the TAMANNA be arranged is
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Gamma Question Bank for Engineering Mathematics>Chapter 7 - Permutations and Combinations>Assignment>Q 19
Number of three letter words that can be formed using only vowels but each only once is
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Gamma Question Bank for Engineering Mathematics>Chapter 7 - Permutations and Combinations>Assignment>Q 20
Numbers of different words that can be made using the letters of the word HALLUCINATION if all consonants are together is
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Gamma Question Bank for Engineering Mathematics>Chapter 7 - Permutations and Combinations>Assignment>Q 21
Number of 6 digit numbers that can be formed using the digit 2 two times and the digit 5 four times is
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Gamma Question Bank for Engineering Mathematics>Chapter 7 - Permutations and Combinations>Assignment>Q 22
Number of ways in which 15 billiard balls be arranged in a row if 3 are identical red, 7 are identical white and remaining are identical black balls is
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Gamma Question Bank for Engineering Mathematics>Chapter 7 - Permutations and Combinations>Assignment>Q 24
The total number of permutations of n different objects taken at least one but not more than r at a time, where each object may be repeated any number of times, is