Alexis rolls a pair of number cubes. What is the probability that both numbers are odd if their sum is ? Interpret your answer in terms of a uniform probability model.

Assign variable names to the events and state what you need to find, using conditional probability.

Show the sample space.

Identify the outcomes in the events.

Identify the outcomes in the events and .

Find and .

Find .

Verify your answer.

Interpret your answer in terms of a uniform probability model.

This applet is provided by Walch Education as supplemental material for the UCSS Secondary Math II program. Visit www.walch.com for more information on our resources.