Mathematics for IGCSE & O level - Probability (Section 5 - No. 34)
A coin is flipped twice. What is the probability of getting heads both times?
1/2
1/4
1/3
2/3
Giải thích
The probability of heads on one flip is 1/2. The probability of heads on two flips is 1/2 * 1/2 = 1/4.