JEE Main & Advanced Mathematics Probability Question Bank Self Evaluation Test - Probability-II

  • question_answer
    A die marked 1, 2, 3 in red and 4, 5, 6 in green is tossed. Let A be the event, "the number is even", and B be the event, "the number is red" then;

    A) \[P(A)P(B)=\frac{1}{6}\]

    B) A and B are independent

    C) A and B are dependent

    D) None of these

    Correct Answer: C

    Solution :

    [c] When a die is thrown, the sample space (S) is \[S=\{1,2,3,4,5,6\}\] Let A: the number is even = \[\{2,4,6\}\] \[\therefore P(A)=\frac{3}{6}=\frac{1}{2}\] B: the number is red \[=\{1,2,3\}\therefore P(B)=\frac{3}{6}=\frac{1}{2}\] \[A\cap B=\{2\},P(A\cap B)=\frac{1}{6}\] or \[P(A).P(B)=\frac{1}{2}\times \frac{1}{2}=\frac{1}{4}\ne \frac{1}{6}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner