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Home > A2C > Chapter 13 > Lesson 13.1.4 > Problem 13-89

13-89.

Sure Shot Jane can hit the bull's eye with a bow and arrow 90% of the time. If she shoots five arrows, what is the probability that three or more arrows hit the bull's eye? Homework Help ✎

To get the probability, add together the probabilities of three arrows, four arrows, and five arrows hitting the bull's eye.

The probability of getting three hits (and two misses) is:

5C3 (0.9)3(0.1)2

Use the same method to find the probabilities of getting four hits and five hits.