KVPY Sample Paper KVPY Stream-SX Model Paper-22

  • question_answer
    An isosceles triangle is chosen from all the triangles whose vertices are chosen from the vertices of a cube. If the probability that the chosen triangle is equilateral is p, then find the value of 840 p.

    A) 210

    B) 410

    C) 230

    D) 240

    Correct Answer: A

    Solution :

    Number of equilateral triangles = 8
    Number of isosceles triangles = 32
    \[\therefore \]      \[p=\frac{1}{4}\]
    \[\therefore \]      \[840p=210\]

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