SOLUTION: Assume that one number from 1 to 7 is equally likely to be selected at random. Each number corresponds to one of the seven figures. Determine the probability of selecting an even n

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Question 1095546: Assume that one number from 1 to 7 is equally likely to be selected at random. Each number corresponds to one of the seven figures. Determine the probability of selecting an even number, given that a square is selected.
1-yellow circle
2- red triangle
3- blue square
4- red square
5- yellow circle
6- blue triangle
7- red circle

Answer by greenestamps(13203) About Me  (Show Source):
You can put this solution on YOUR website!

"... given that a square was selected" means there are only two possibilities -- the selection was 3, blue square, or 4, red square.

Only one of those two possibilities has an even number.

So the probability is 1/2.