JAMB 2003 · UME · Q48
Two dice are thrown. What is the probability that the sum of the numbers is divisible by 3?
Worked solution (try it first)
- Two dice give 36 equally likely outcomes, with sums from 2 to 12.
- The sums divisible by 3 are 3, 6, 9 and 12.
- They occur 2, 5, 4 and 1 times, which is 12 outcomes.
- So the probability is , option B.