Question

    10 points on a plane are chosen such that none of them

    is collinear. How many different straight lines can be formed by joining these points?
    A 55 Correct Answer Incorrect Answer
    B 90 Correct Answer Incorrect Answer
    C 45 Correct Answer Incorrect Answer
    D 35 Correct Answer Incorrect Answer

    Solution

    To draw a straight line, 2 points are required. There is total 10 points, total way to select 2 points from them. =10C2 =10×9/2=45.

    Practice Next

    Relevant for Exams: