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

13-89.

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:

_{5}C_{3} (0.9)^{3}(0.1)^{2}

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