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KVPY Sample Paper KVPY Stream-SX Model Paper-16

  • question_answer
    For a biased die the probabilities for the different faces to turn up are given below:
    Faces: 1 2 3 4 5 6
    Probabilities 0.10 0.32 0.21 0.15 0.05 0.17
    The die is tossed and you are told that either face one or face two has turned up. Then the probability that it is face one is -

    A) 1/6

    B) 1/10  

    C) 5/49     

    D) 5/21

    Correct Answer: D

    Solution :

    \[P(A/A\cup B)=\frac{P(A/A\cup B)}{P(A\cup B)}\] =\[\frac{P(A)}{P(A)+P(B)}=\frac{0.10}{0.10+0.32}\]


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