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How many even numbers are there with thr...

How many even numbers are there with three digits such that if 5 is one of the digits, then 7 is the next digit ?

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MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXERCISE
  1. In how many distinct ways can the product xy^2z^2 be written without u...

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  2. There are 3 white, 4 red and 1 blue marbles in a bag. They are drawn o...

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  3. How many even numbers are there with three digits such that if 5 is on...

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  4. How many arithmetic progressions with 10 terms are there whose first t...

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  5. Find the number of words which can be made by using all the letters of...

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  6. If there are six periods on each working day of a school, in how many ...

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  7. Find how many arrangements can be made with the letters of the word ‘M...

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  8. Find how many arrangements can be made with the letters of the word ‘M...

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  9. Find how many arrangements can be made with the letters of the word ‘M...

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  10. In how many ways can the letters of the word PERMUTATIONS be arranged ...

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  11. In how many ways can the letters of the word PERMUTATIONS be arranged ...

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  12. In how many ways can the letters of the word PERMUTATIONS be arranged ...

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  13. Four persons A, B, C and D are to be seated at a circular table. In ho...

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  14. There are 6 gentlemen and 5 ladies to dine at a round table. In how ma...

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  15. Four men and four women sit to dine at a round table. In how many ways...

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  16. In how many ways can 5 persons A, B,C, D and E sit around a circular t...

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  17. In how many ways can 5 persons A, B,C, D and E sit around a circular t...

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  18. How many different necklaces can be formed with 6 white and 5 red bead...

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  19. Find the number of ways in which n different beads can be arranged to ...

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  20. Find the number of ways in which n things of which r are alike, can be...

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