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How many words, with or without meaning,...

How many words, with or without meaning, can be formed using all the letters of the word CHEMISTRY, using each letter exactly once? How many of them start with C and end with Y?

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MAXIMUM PUBLICATION-PERMUTATION AND COMBINATIONS-EXAMPLE
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  2. Find the value of n such that nP5=42 xx nP3,n>4

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  3. How many words, with or without meaning, can be formed using all the l...

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  4. If 2nC3 : nC3 = 12:1 find n.

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  5. What is the number of ways of choosing 4 cards from a pack of 52 playi...

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  6. If nC9 = nC8 find nC17

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  7. A committee of 5 person is to be selected from a group of 4 men and 5 ...

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  8. If nC9 = nC8 find nC17

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  9. How many three digit number can be formed using the digits 1,2,3,4,5 i...

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  10. In How many ways can a team of 4 boys and 3 girls be selected from 6 b...

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  11. If nC5 = nC4 find nC8

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  12. How many chords can be drawn through 20 points on a circle?

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  13. A bag contains 6 red and 5 blue balls. In how many ways can one choose...

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  14. Find the number of permutation of the letters of the word ALLAHABAD.

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  15. Find r ,if ^5Pr = 2 xx ^6P(r-1)

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  16. Find the value of n such that nP5=42 xx nP3,n>4

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  17. A committee of 3 persons is to be constituted from a group of 2 men an...

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  18. A committee of 3 persons is to be constituted from a group of 2 men an...

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  19. If ^nC2 : ^(2n)C1 = 3:2 find n

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  20. Find the number of words that can be formed from the letters of the wo...

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