Mathematics for IGCSE & O level - Probability (Section 3 - No. 16)
A box contains 5 red, 3 blue, and 2 green marbles. If you pick one marble, replace it, and then pick another, what is the probability of picking a red marble and then a blue marble?
3/20
1/6
1/3
5/100
Forklaring
P(Red) = 5/10 and P(Blue) = 3/10. The probability of picking red and then blue is (5/10) * (3/10) = 15/100 = 3/20.