joannak5351 joannak5351

27-06-2017
Mathematics

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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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texaschic101 texaschic101

27-06-2017

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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