Independent and Dependent Probability

P(blue, X)

P(not white, Y)

P(white, 4)

P(black, 2)

P(not white, odd)

There are 6 red marbles, 5 green marbles, and 4 yellow marbles in a bag. If Joe picks 2 marbles one after the other without replacement, then what is the probability that both are red in color? (a)  

• 2/5
• 1/21
• 4/25
• 1/7