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If 20 lines are drawn in a plane such th...

If 20 lines are drawn in a plane such that no two of them are parallel and no three are concurrent. In how many points will they intersect each other ?

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MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXERCISE
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  2. In an examination, Yamini has to select 4 questions from each part. Th...

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  3. If 20 lines are drawn in a plane such that no two of them are parallel...

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  4. There are 15 points in a plane, no three of which are collinear. Find ...

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  5. A student is allowed to select atmost n books from a collection of (2n...

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  6. Determine the number of 5 card combinations out of a deck of 52 cards ...

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  7. In how many ways can we select a cricket eleven from 17 players in whi...

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  8. In how many ways can a football team of 11 players be selected from 16...

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  9. A committee of 5 members is to be selected from among 6 boys and 5 gir...

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  10. In how many ways a committee of 5 members can be selected from 6 men a...

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  11. Out of 5 men and 2 women a committee of 3 is to be formed. In how many...

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  12. A committee of 3 members is to be formed out of 5 men and 2 women. Fin...

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

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  14. A group consists of 4 girls and 7 boys. In how many ways can a team of...

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  15. A group consists of 4 girls and 7 boys. In how many ways can a team of...

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  16. A group consists of 4 girls and 7 boys. In how many ways can a team of...

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  17. In how many ways can 5 members forming a committee out of 10 be select...

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  18. In how many ways can 5 members forming a committee out of 10 be select...

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  19. A question paper has two parts: Part A and Part B. each part containin...

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  20. A mathematics paper consists of 10 questions divided into two parts I ...

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