Home
Class 11
MATHS
Out of 18 points in as plane, no three p...

Out of 18 points in as plane, no three points are in the same straight line except five points which are collinear. The number of straight lines formed by joining them is

A

805

B

806

C

816

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • PERMUTATIONS AND COMBINATIONS

    OBJECTIVE RD SHARMA ENGLISH|Exercise Chapter Test|60 Videos

  • PERMUTATIONS AND COMBINATIONS

    OBJECTIVE RD SHARMA ENGLISH|Exercise Section II - Assertion Reason Type|9 Videos

  • PARABOLA

    OBJECTIVE RD SHARMA ENGLISH|Exercise Chapter Test|30 Videos

  • PROBABILITY

    OBJECTIVE RD SHARMA ENGLISH|Exercise Chapter Test|45 Videos

Similar Questions

Explore conceptually related problems

There are 10 points in a plane, no three of which are in the same straight line, except 4 points, which are collinear. Find the number of lines obtained from the pairs of these points,

Three are 12 points in a plane, no of three of which are in the same straight line, except 5 points whoich are collinear. Find (i) the numbers of lines obtained from the pairs of these points. (ii) the numbers of triangles that can be formed with vertices as these points.

There are 10 points in a plane out of these points no three are in the same straight line except 4 points which are collinear. How many (i) straight lines (ii) trian-gles (iii) quadrilateral, by joining them?

There are 15 points in a plane, no three of which are in a straight line except 4, all of which are in a straight line. The number of triangles that can be formed by using these 15 points is:

There are 15 points in a plane, no three of which are in the same straight line with the exception of 6, which are all in the same straight line. Find the number of i. straight lines formed, ii. number of triangles formed by joining these points.

There are 12 points in a plane of which 5 are collinear . Find the number of straight lines obtained by joining these points in pairs .

There 12 points in a plane of which 5 are collinear . Find the number of straight lines obtained by joining these points in pairs.

There are 10 points in a plane, out of these 6 are collinear. The number of triangles formed by joining these points, is

There are 16 points in a plane of which 6 points are collinear and no other 3 points are collinear.Then the number of quadrilaterals that can be formed by joining these points is

There are ten points in a plane. Of these ten points, four points are in a straight line and with the exceptionof these four points, on three points are in the same straight line. Find i. the number of triangles formed, ii the number of straight lines formed iii the number of quadrilaterals formed, by joining these ten points.

OBJECTIVE RD SHARMA ENGLISH-PERMUTATIONS AND COMBINATIONS-Exercise
  1. A parallelogram is cut by two sets of m lines parallel to its sides. T...

    Text Solution

    |

  2. There are n straight lines in a plane in which no two are parallel and...

    Text Solution

    |

  3. Out of 18 points in as plane, no three points are in the same straight...

    Text Solution

    |

  4. Given 5 different green dyes, four different blue dyes and three diffe...

    Text Solution

    |

  5. Eight chairs are numbered 1 to 8. Two women and three men wish to oc...

    Text Solution

    |

  6. A student is allowed to select atlest one an atmost n books from a col...

    Text Solution

    |

  7. In a steamer there are stalls for 12 animals and there are cows, horse...

    Text Solution

    |

  8. The number of different numbers that can be formed by using all the di...

    Text Solution

    |

  9. Number of ways in which RS. 18 can be distributed amongst four persons...

    Text Solution

    |

  10. A box contains 2 white balls, 3 black balls & 4 red balls. In how many...

    Text Solution

    |

  11. The number of ways in which four letters can be selected from the word...

    Text Solution

    |

  12. find the number of arrangements which can be made out of the letters o...

    Text Solution

    |

  13. The number of ways in which seven persons can be arranged at a round t...

    Text Solution

    |

  14. The total number of ways in which 4 boys and 4 girls can form a line, ...

    Text Solution

    |

  15. How many different words can be formed by jumbling the letters in the ...

    Text Solution

    |

  16. A code word consists of three letters of the English alphabet followed...

    Text Solution

    |

  17. Find the number of words formed by permuting all the letters of the ...

    Text Solution

    |

  18. A father with 8 children takes 3 at a time to the Zoological Gardens, ...

    Text Solution

    |

  19. A man has 8children to take them to a zoo. He takes thre of them at a ...

    Text Solution

    |

  20. If the letters of the word ‘LATE’ be permuted and the words so perfo...

    Text Solution

    |