Discrete Math If you roll a pair of six sided dice one red a

Discrete Math

If you roll a pair of six sided dice, one red and one black, there are 36 possible rolls, e.g. the red die comes up 3 and the black die comes up 5. How many rolls satisfy the following condition?

The two dice have different numbers

Solution

There will be following cases that does not satisfy condition : The two dice have different numbers

red die black die

4 6

5 6