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How many stainght lines can be draw...

How many stainght lines can be drawn by joning 10 points on a circle ?

A

`""^(55)C_(8)xx"^(5)C_(2)`

B

`""^(8)C_(3)xx""^(5)C_(3)`

C

344

D

45

Text Solution

Verified by Experts

The correct Answer is:
D
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-PRACTICE EXERCISE
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  2. There are 21 points in a plane no three of which are collinear. The nu...

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  3. How many stainght lines can be drawn by joning 10 points on a ...

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  6. There are n points in a plane no three of which are in the same...

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  7. There are n points in a plane no three of which are in the same...

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  8. p points are chosen on each of the three coplanar lines. The maximum n...

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  14. How many different sums can be formed with the following coins ...

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  16. In a packet there are m different books, n different pens and p differ...

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  17. The number of divisors of 2^(6)3^(5)5^(3)7^(4)11 is

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  18. The sum of divisores of 2^(5).3^(4) is

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  19. The number of positive divisors of 2 ^5 , 3^6 ,7^3 is

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  20. The number of all positive divisors of 2 ^5 , 3^4 , 5^3 is

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