Homework Help: math

Posted by jon apples on Tuesday, October 16, 2012 at 4:13am.

if there are 16 marbles in a bag and 8 are red red with 6 green and 2 blue what is the probability of getting matching marbles in 2 draws from the bag

math - Reiny, Tuesday, October 16, 2012 at 9:20am
could be RR GG or BB , assuming the 1st marble is not returned

prob(RR) = (8/16)(7/15) = 7/30
prob(GG) = (6/16)(5/15) = 1/8
.....

add them up.

I am sure you can handle the rest

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