Answer:
1/18
Explanation:
When rolling two number cubes, each cube has six sides numbered 1 to 6. To determine the probability of obtaining a sum of 3, we need to identify the number of favorable outcomes (sums that equal 3) and the total number of possible outcomes.
There are two possible ways to obtain a sum of 3:
- Rolling a 1 on the first cube and a 2 on the second cube.
- Rolling a 2 on the first cube and a 1 on the second cube.
Therefore, there are two favorable outcomes.
The total number of possible outcomes when rolling two number cubes is found by multiplying the number of sides on each cube. Since each cube has six sides, the total number of outcomes is 6 x 6 = 36.
So, the probability of rolling a sum of 3 is given by:
Probability = (Number of favorable outcomes) / (Total number of possible outcomes)
Probability = 2 / 36
Probability = 1 / 18
Therefore, the probability of obtaining a sum of 3 when rolling two number cubes is 1/18.