Mathematics for IGCSE & O level - Probability (Section 2 - No. 22)
What is the probability of the first ball being green, and the second ball being blue, if there are 5 green balls, 3 red balls and 2 yellow balls and the ball is replaced?
3/25
3/10
1/5
5/10
解释
P(green) = 5/10 or 1/2; P(blue) = 0; P(green and blue) = 0. Since no blue balls