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There are 3 red, 1 blue, and 2 yellow marbles in a bag. Once a marble is selected, it is not replaced. Probability of red then blue
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hmmm interesting, going to have to brush up on prob really quick
ok no problem
ok so this looks like the right track... but it's not exactly easy
so do you know the answer?
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I like need help badly!
well, the red has to be selected first
so the probability of that is 3/6 (1/2)
now you need the next one to be blue
bu there are less reds left - one less in fact
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so the probability of a blue at that point is 1/5
so that means the total probability is 1/2 * 1/5 = 1/10
so its 1/10?
yep
ok thnk you
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np =)
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