Mathematics for IGCSE & O level - Probability (Section 3 - No. 38)
A jar contains 2 red marbles, 3 blue marbles, and 5 green marbles. If you pick one marble, what is the probability it is green?
1/5
1/2
1/3
2/5
Explicació
5 green marbles out of a total of 10 (2+3+5), so 5/10 = 1/2