Mathematics for IGCSE & O level - Probability (Section 2 - No. 19)
If you roll a six-sided die, what is the probability of *not* rolling a 1?
1/6
1/3
5/6
1
คำอธิบาย
The probability of rolling a 1 is 1/6. The probability of not rolling a 1 is 1 - 1/6 = 5/6