# Thread: Need Urgent Help...Probability

1. ## Need Urgent Help...Probability

Hello all,

Really could use some help:

Two hats contain red and blue marbles with the following distributions: hat #1 has 2 red and 8 blue marbles and hat #2 has 8 red marbles and 2 blue marbles. Kathy selects a hat at random and randomly pulls out 2 marbles (without replacement). Both are blue. If she switches hats, what is the probability that she will now select a red marble?

Thank you

2. Originally Posted by cheyanne
Hello all,

Really could use some help:

Two hats contain red and blue marbles with the following distributions: hat #1 has 2 red and 8 blue marbles and hat #2 has 8 red marbles and 2 blue marbles. Kathy selects a hat at random and randomly pulls out 2 marbles (without replacement). Both are blue. If she switches hats, what is the probability that she will now select a red marble?

Thank you
didn't you ask this question already? no double posting please