SOLUTION: If a student can solve one of 4 problems. If he attempts 4 questions in succession. What is the probability that at least one of them is right?

Question 884041: If a student can solve one of 4 problems. If he attempts 4 questions in succession. What is the probability that at least one of them is right?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
First find the probability that all of them are wrong.

The probability of at least one right plus the probability of all wrong must sum to 1.

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