Name: Michael
Who is asking: Student
Level of the question: Middle

Question: I cannot figure out this problem:
A bag contains 9 red, 6 white, 3 blue, and 8 green marbles. Two marbles are drawn, but the first marble drawn is not replaced. Find P(white, then white). Make into one reduced fraction.

if someone could help me that would be nice. Michael


Hi Michael.

At the start, 6 out of 26 marbles in the bag are white. So your
chance of drawing a white one is just that: 6/26.

Let's say you did that. Now what are your chances of drawing another
white one? There are 25 marbles left in the bag and 5 are white. So
the chance of drawing a white one in this situation is 5/25.

Since the two drawings are independent of each other, you just
multiply the probabilities together to get your answer.

Hope this helps,
Paul and Sue