New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    Two numbers are chosen at random without replacement from

    the set of first 20 natural numbers. Find the probability that both the numbers are even.
    A 5/38 Correct Answer Incorrect Answer
    B 1/4 Correct Answer Incorrect Answer
    C 9/38 Correct Answer Incorrect Answer
    D 2/9 Correct Answer Incorrect Answer
    E 3/20 Correct Answer Incorrect Answer

    Solution

    Total numbers = 20
    Even numbers = 10
    Required probability = ( 10 C 2 ) / ( 20 C 2 ) = 45 / 190 = 9/38

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