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20 July, 20:21

Find the probability of correctly answering the first 3 questions on a multiple choice test if random guesses are made and each question has 5 possible answers.

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  1. 20 July, 20:48
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    Each question has 1 correct answers ... and their are 5 possible answers

    probability of getting 1st question correct is 1/5

    probability of getting 2nd question correct is 1/5

    probability of getting 3rd question correct is 1/5

    and since all of these events are independent, to find the probability of getting all 3 right, we must multiply

    1/5 * 1/5 * 1/5 = 1 / 125 <==
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