Each question has four choices, then the probability to guess a correct answer is

and the probability to select incorrect choice is

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You have a 5-question multiple-choice test, then n=5. The <span>probability that you will guess exactly three out of five questions correctly is </span>
<span /><span>
</span><span>

</span>

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I’m not exactly sure how to calculate the grade, but this is what I’ve done below. Hope it helps!
Answer:
Option 2.
Step-by-step explanation:
You are bisecting angle BAC with pencil and compass.