Mathematics for IGCSE & O level - Probability (Section 1 - No. 34)
In a class, 40% of the students are girls. If a student is selected randomly, what is the probability that the student is a boy?
0.4
0.5
0.6
0.7
Εξήγηση
Since 40% are girls, 100% - 40% = 60% must be boys, which translates to 0.6