Final answer:
The probability of rolling an even number on a number cube is 1/2, and the probability of rolling a 1 or 2 is 1/6.
Step-by-step explanation:
P(even) means the probability of rolling an even number. Since there are 3 even numbers on a number cube (2, 4, and 6), and there are 6 total numbers, the probability would be 3/6 or 1/2.
P(1 or 2) means the probability of rolling a 1 or a 2. Since there is only 1 outcome that is either 1 or 2, and there are 6 total outcomes, the probability would be 1/6.