Question

Joe has a bag of 11 marbles: 4 red marbles, 3, yellow marbles, and 4 blue marbles. If the first marble he draws is a red marble, then what is the probability that he will draw a blue marble on his second try?

Answer 1

3/10

Explanation:

Since he draws a red marble first, now there are 10 marbles: 3 red, 3 yellow, and 4 blue. Since probability is desired outcome over total possibilities and your desired outcome is a red marble (3) and your total possibilities is 10, the answer is 3/10.