### Home > CCA2 > Chapter 11 > Lesson 11.1.2 > Problem 11-24

11-24.

Eddie told Allison,

*“I’ll bet if I flip three coins, I can get exactly two heads.”*

Allison replied, “

*I’ll bet I can get exactly two heads if I flip four coins!*”

Eddie scoffed, “

*Well, so what? That’s easier.*”

Allison argued, “

*No, it’s not. It’s harder*.”

Who is correct? Show all of your work and be prepared to defend your conclusion.

Make a tree diagram and calculate the probabilities.