Answer:
B, 1/12
Explanation:
The chance of rolling a three on a number cube would be 1/6, because there are six different possibilities that you could roll (1, 2, 3, 4, 5, or a 6) and only one of those possibilities would be a three.
The chance of flipping a coin and getting heads is 1/2, because there are two different possibilities that you could flip (heads or tails) and only one of those possibilities would be heads.
BUT YOU'RE NOT DONE YET!!!
Since it asks for what the probability for doing BOTH of those things, you have to multiply them. Just multiply the numerators and denominators. For 1/6 x 1/2, you'd do 1 x 1 equals 1, so that would be the answer's numerator. Then you'd do 6 x 2, which equals 12, and that would be the answer's denominator. So, putting those two together, you'd get the answer of 1/12.