<PRE><B>Question 747693</B>
First, add the number of marbles together = 20.

Event A:1st marble is drawn is green: Probability is 3/20
Event B:2nd marble is drawn is green: Probability is 2/19
P(B) depends on the P(A)
P(A) = 3/20
P(B|A) = 2/19 (The probability of B happening assuming A happened) 
P(A and B)= P(A) * P(B|A)
P(A and B) =3/20 * 2/19= .0016






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