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    Question

    A number is chosen at random from first 20 natural

    numbers. Find the probability that the chosen number is prime.
    A 7/20 Correct Answer Incorrect Answer
    B 9/20 Correct Answer Incorrect Answer
    C 2/5 Correct Answer Incorrect Answer
    D 4/5 Correct Answer Incorrect Answer

    Solution

    Prime numbers up to 20 = 2, 3, 5, 7, 11, 13, 17, 19

    Required probability = (8/20) = (2/5)

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