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How many 6-digit numbers can be formed f...

How many 6-digit numbers can be formed from the digits 0, 1, 3, 5, 7 and 9 which are divisible by 10 and no digit is repeated?

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NEW JOYTHI PUBLICATION-PERMUTATIONS AND COMBINATIONS-QUESTIONS FROM COMPETITIVE EXAMS
  1. How many 6-digit numbers can be formed from the digits 0, 1, 3, 5, 7 a...

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  2. The number of ways in which a 7 people can sit around a round table is

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  3. There are (n + 1) white and (n + 1) black balls, each set numbered 1 t...

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  4. If ""^(n)P(r)=720" "^(n)C(r), then r is equal to

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  5. Everybody in a room shakes hands with everybody else. The total n...

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  6. The number of four-digit even numbers that can be formed using 0, 1, 2...

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  7. The number of circular permutations of n different objects is

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  8. The number of ways in which 5 boys and 3 girls be seated in a row so t...

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  9. If n and r are two positive integers such that nger,"then "^(n)C(r-1)+...

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  10. If ""^(4)C(r)=""^(4)C(r+1), then the value of r is

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  11. The number of straight lines that can be formed by joining 20 points o...

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  12. The number of ways in which a committee of 6 members can be formed fro...

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  13. Evaluate the following: ""^(20)C(4)=

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  14. Let N be the number of quadratic equations with coefficients from {0, ...

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  15. If ""^(n)C(3)=220, then n = ?

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  16. A polygon has 54 diagonals. Number of sides of this polygon is

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  17. In how many ways can 8 students be arranged in a row?

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  18. The number of different permutations of the word word 'BANANA' is

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  19. Rank of the word " MOTHER " is

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  20. Six X's have to be placed in the squares of the figure below, such tha...

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  21. A student is to answer 10 out of 13 questions in an examination such t...

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