Mathematics for IGCSE & O level - Probability (Section 1 - No. 11)
If there are 8 green balls and 2 white balls, two balls are selected without replacement. What is the probability of choosing two white balls?
1/5
1/45
8/45
4/5
Explicação
(2/10) * (1/9) = 2/90 = 1/45