Compute the expected rate of return for starlight

Question

Problem:

Starlight, Inc. must choose between two asset purchases. The annual rate of return and related probabilities given below summarize the firm's analysis.

                Asset A                               Asset B
Rate of Return    Probability    Rate of Return    Probability
8%                        40%                 7%               30%
13%                      50%                17%               50%
18%                      10%                27%               20%

For each project compute: The expected rate of return.