A bag contains 3 red lego blocks, 5 blue, and 4 yellow. 2 are drawn without replacement. what is the probability of drawing 2 red blocks?

Question

A bag contains 3 red lego blocks, 5 blue, and 4 yellow. 2 are drawn without replacement. what is the probability of drawing 2 red blocks?

Answer 1

Hi Nat, there are 12 blocks in the bag. The probability of drawing a red ball is 3/12, or 1/4. There are now 11 blocks in the bag. The probability of drawing a red ball is 2/11.

 

The probability of drawing the two red balls is: 1/4 * 2/11, or 1/22.

 

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