Mathematics for IGCSE & O level - Probability (Section 4 - No. 15)
In a school, 70% of the students are female. If a student is chosen at random, what's the probability the student is male?
0.3
0.7
1.0
0.0
説明
The sum of the probabilities equals 1. So 1 - 0.7 = 0.3