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Home > CCG > Chapter 5 > Lesson 5.1.2 > Problem 5-20


The spinner at right has three regions: A, B, and C. To play the game, you must spin it twice. If the game were played times, how many times would you expect to get A on both spins? Use a tree diagram or area model to help you answer the question.  

What is for one spin?
Remember how many degrees are in a circle.

Are the spins independent of each other? That means the first spin has no effect on the outcome of the second spin.

What is the probability of spinning an A on the first spin? Multiply by the probability of spinning an A on the second spin.

Multiply the , by to find how many times you would expect to get A on both spins during the trials.


A spinner is divided in three sections. One fourth section is labeled A. A second section is labeled B with an angle of 135 degrees. The last section is labeled C.