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Multiple Choice Questions

Ten points are marked on a straight line and eleven points are marked on another straight line How m...........

Quantitative Aptitude ( CCS) Permutation & Combination
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    Ten points are marked on a straight line and eleven points are marked on another straight line. How many triangles can be constructed with vertices from among the above points?

    495

    Incorrect Answer

    550

    Incorrect Answer

     1045

    Correct Answer

     2475

    Incorrect Answer
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    Explanation:

    To form a triangle, you have to choose one point from first set and two points from the second set.

    So, total number of triangles possible: 
    (10C1)*(11C2) + (10C2)*(11C1) = 1045.

    Hence, option 3 is the correct answer.

    By: Amit Kumar
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