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How many words each consisting of five d...

How many words each consisting of five different letters can be formed by taking 2 consonant from 9 different consonant and 3 vowels from 5 different vowels?

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43200
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CHHAYA PUBLICATION-PERMUTATION AND COMBINATION -EXERCISE 7B ( Short Answer Type Questions )
  1. Prove that if ngt7 then .^(n-1)C(3)+.^(n-1)C(4)gt^(n)C(3)

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  2. How many different triangles can be formed by joining the angular poi...

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  3. How many words each consisting of five different letters can be formed...

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  4. find the number of different words that can be formed from 12 consonan...

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  5. A person has got 15 acquaintances of whom 10 are relatives . In how ma...

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  6. In how many different ways can 9 men be selected from 15 men so as to ...

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  7. In how many ways can a committee of a 3 ladies and 4 gentlemen be appo...

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  8. m men and n women are to be seated in a row that no two women sit tog...

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  9. Eight prizes are to be distributed by a lottery . The first participa...

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  10. In an election there are 7 candidates and 4 members are to be elected...

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  11. In a plane there are 10 points out of which no three are collinear exc...

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  12. If 20 straight lines be drawn in a plane , no two of them being parall...

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  13. If 10 parallel lines in a plane are intersected by a family of anothe...

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  14. There are 15 points in a plane of which 4 points lie in one stright li...

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  15. Show that in the number of combinations of 2n different things taken n...

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  16. How many different numbers of 6 digits each (without repetition of dig...

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  17. If the number of combinations of n different things taken (r+r) at a t...

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  18. In how many ways can a person contribute to a charitabe fund out of 10...

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  19. Find the number of factors of 37800 .

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  20. Find the number of different factors of 3528 which are greater than 1 ...

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