Asked by B.B.

Could someone please let me know if I did this problem right?
A bag contains seven blue marbles and five red marbles. One marble is drawn at random without replacement, and then a second marble is drawn. What is the probability that the second marble is blue if the first marble was blue?
I say 6/11, is this right?
Thanks.
Answered by drwls
If the first drawn marble was blue, there are 6 blues and 5 reds left. Yes, the answer is 6/11.
Answered by fadil
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