Multiple Choice Questions on In a box 4 blue pens 3 red pens and 5 black pens If 2 pens taken from the box What is the probabilit........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

In a box 4 blue pens 3 red pens and 5 black pens If 2 pens taken from the box What is the probabilit...........

Quantitative Aptitude ( CCS) Probability
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    In a box 4 blue pens, 3 red pens and 5 black pens. If 2 pens taken from the box, What is the probability that both of them are same colour pens ?

    66/19

    Incorrect Answer

    15/28

    Incorrect Answer

    18/35

    Incorrect Answer

    19/66

    Correct Answer
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    Explanation:

    Answer
    19/66
    Explanation :
    4C2 + 3C2 + 5C2  = 6+3+10 = 19
    12C2 = 66
    P = 19/66

    By: Sandeep Dubey
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