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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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Important Questions on Permutations and Combinations

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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 23
Number of 7 digit telephone numbers that can be formed from the digits 0,1,2,......9, if each telephone number begins with digit 5 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
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Gamma Question Bank for Engineering Mathematics>Chapter 7 - Permutations and Combinations>Assignment>Q 25
An n-digit number is a positive number with exactly n-digits. Nine hundred distinct n-digit numbers are to be formed using only the three digits 2,5 and 7. The smallest value of n for which this is possible is
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Gamma Question Bank for Engineering Mathematics>Chapter 7 - Permutations and Combinations>Assignment>Q 26
The number of arrangements of the letter of the word PAPAYA in which the two 'P' do not appear adjacently is
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Gamma Question Bank for Engineering Mathematics>Chapter 7 - Permutations and Combinations>Assignment>Q 27
How many different nine-digit numbers can be formed from the number 223355888 by rearranging its digits, so that odd digits occupy even positions?
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Gamma Question Bank for Engineering Mathematics>Chapter 7 - Permutations and Combinations>Assignment>Q 28
How many words are formed if the letters of the word GARDEN are arranged with the vowels in alphabetical order?