Question

Two fair dice are thrown one red one black. what is the probability that the red die comes up 1 given that the black die comes up 3

Answer 1

Probability that red is 1 is $\frac{1}{6}$

Probability that black is 3 is $\frac{1}{6}$


The probability that both of these events happen at the same time is $\frac{1}{6}* \frac{1}{6}$