You have a bag of 17 marbles. four are blue, six are green, 2 are red and the others are yellow. what us the probability of drawing a blue marble, replacing it, and then drawing a yellow marble?

With replacing the first drawn marble, you have independent events and the probability of both happening would be the product of probability of each event.

Looks like this:
Probability of drawing a blue first marble  = 
After replacing the blue marble, note that we still have 17 total marbles
Probability of drawing a yellow second marble =  

Now:  P(B, then Y) =  = 

Or about a 7% chance!

Letter c hope it