4) Mrs. Smith keeps two reward envelopes in her desk. They have colored red, blue, and orange squares in them and each color corresponds to a prize. Envelope A has 3 red, 4 blue, and 1 orange square. Envelope B has 2 red, 2 blue, and 2 orange squares. The only way to get the prize is to give the correct probability for the color you draw. Mrs. Smith pulls out a reward envelope at random and Eric selects a square from that envelope at random. What probability should he tell
her if he draws a red? Express your answer as a fraction in lowest terms.
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- Envelope A: The probability of choosing this envelope is _______ and once you choose it, you have a ______ probability of getting a red for a combined probability of
______
- Envelope B:The probability of choosing this envelope is ______ and once you choose it, you have a ______ probability of getting a red for a combined probability of
________
- The probability of getting a red from A or B is the sum of their probabilities =
___________________
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