Answer:
See detailed explanation below.
Step-by-step explanation:
Total marbles in the bag
= 4 red + 6 green + 8 yellow + 2 blue
= 20 marbles.
Probability of event that a blue on first draw, P(B) = 2/20
Marble was then replaced to remain a total of 20 marbles.
Probability of event that a yellow in the second draw, P(Y) = 8/20
The probability of both events happening is the product of the probabilities of the events, hence
P(B then Y) = 2/20 * 8/20 = 16/400 = 1/25
Answer:
The probability of drawing a blue marble, replacing it, then drawing a yellow marble is 1/25.
