Mathematics for IGCSE & O level - Probability (Section 8 - No. 46)
A company surveyed its employees about their favorite ice cream flavors. 30% chose vanilla, 40% chose chocolate, and 30% chose strawberry. What is the probability that an employee chosen at random *doesn't* choose vanilla?
30%
40%
60%
70%
説明
The probability of not choosing vanilla is 100% - 30% = 70%.