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Number of triangles that can be formed b...

Number of triangles that can be formed by joining the 10 non-collinear points on a plane is

A

136

B

140

C

128

D

120

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The correct Answer is:
D
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Number of different striaght lines that cn be formed by joining 12 different points on a plane of which 4 are collinear is

Assertion (A) : The number of triangles that can formed by joining the mid-points of any three adjacent faces of a cube is 20 Reason (R): If there are n point on a plane and none of them are collinear, then the number of triangles that can be formed is C(n, 3)

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AAKASH INSTITUTE-PERMUTATIONS AND COMBINATIONS -Assignment Section A Objective type questions (One option is correct )
  1. Number of different striaght lines that cn be formed by joining 12 dif...

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  2. A polygon has 90 diagonals , Number of its sides

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  3. Number of triangles that can be formed by joining the 10 non-collinear...

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  4. Number of different words that can be formed from 15 consonants and 5 ...

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  5. A box contains 7 red , 6 white and 4 blue balls. Number of ways of sel...

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  6. In a test paper there are 10 questions . Number of ways in which 6 que...

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  7. How many four digit natural numbers not exceeding the number 4321 can ...

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  8. Number of ways in which the letters of the word MOBILE be arranged so ...

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  9. Number of ways in which the letters of the word RIANBOW be arranged su...

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  10. Number of even numbes greater than 300 that can be formed with the dig...

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  11. There are 6 books of physics , 3 of chemistry and 4 of biology . Numbe...

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  12. A person has 5 shirts, 4 coat and 7 ties . Number of ways in which he ...

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  13. Number of ways in which 15 different books can be arraged on a shelf s...

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  14. How many 6 digit numbers can be formed out of the digits of the number...

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  15. Number of ways in which n balls be randomly distributed in n cells is

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  16. Number of three digit numbers such that atleast one of the digits is 9...

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  17. Number of ways in which the letters of the word TAMANNA be arranged is

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  18. Number of three letter words that can be formed using only vowels but ...

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  19. Number of all permutations of the set of four letters E , O , S , P ta...

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  20. Number of ways in which 5 prizes be given away to 8 students when elac...

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