The probability that a particular rotator cuff surgery is successful is 0.9.
1. Find the probability that three rotator cuff surgeries are successful.
2. Find the probability that none of the three rotator cuff surgeries are successful.
3. Find the probability that at least one of the three rotator cuff surgeries is successful.
a. Decide whether to find the probability of the event or its complement.
b. Use the Multiplication Rule to find the probability. If necessary, use the complement.
c. Determine whether the event is unusual. Explain.