Mathematics for IGCSE & O level - Probability (Section 1 - No. 39)
In a class, 10 students are wearing red shirts, 15 are wearing blue, and 5 are wearing green. What is the probability that a randomly selected student is wearing a blue shirt?
1/4
1/3
1/2
3/5
Giải thích
There are 15 blue shirts out of a total of 30 students (10+15+5). So the probability is 15/30=1/2.