Statisitcs Quesiton! PLZ HELP?

  • Thread starter Thread starter Lacy
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Lacy

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A multiple-choice test has 6 questions each with 4 responses, one of which is correct. The lowest number of correct answers a student must obtain in order to receive a grade of A is 4. Find the probability of receiving an A by randomly and independently guessing at the correct answer.


Can anyone tell me the answer and help me undertand how to do the problem?
Thanks in advance
 
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