Mathematics for IGCSE & O level - Probability (Section 6 - No. 35)
Two dice are rolled. What is the probability the sum of the numbers is an even number?
1/6
1/2
1/3
2/3
解释
The sums are even half the time because odd + odd = even, and even + even = even, and odd + even is always odd, thus 1/2.