When taking a 7 question multiple choice test,where each question has 5 possible answers,it would be unusual to get ...........or more questions correctly by guessing alone?

1 Answer
Joe B.
Mar 17, 2018

It would be unusual to get 2 or more questions correct by guessing.

Explanation:

You have a 1 in 5 probability of guessing the correct answer for a single question. You have 7 opportunities to guess.

#7 * 1/5 = 7/5 = 1 2/5#

So guessing more than 1 question correctly with 7 total questions on the test (trials) would be unusual. Guessing correctly on at least 1 question would be expected.

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