When you arrive at your statistics class on a hot Thursday afternoon, Probability statistics assignment help

When you arrive at your statistics class on a hot Thursday afternoon, Probability statistics assignment help

When you arrive at your statistics class on a hot Thursday afternoon, you suddenly realize that today is the mid-term exam. You completely forgot about that! Unfortunately, you haven’t paid any attention to the lectures or literature in the past eight weeks. The test is multiple choice. It consists of 30 question, each with 4 possible answers (A,B,C andD). You will pass the exam if you answer 20 of the 30 questions correctly.

You decide that your best course of action is to give a random answer to each question ( you don’t even bother to read the questions or the answer).

a) What is the probability that you answer all 30 questions correctly?

b) What is the probability that you answer none of the questions correctly?

c) What is the probability that you answer at least 20 questions correctly?

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