In the section on "Counting Combinations" you have this:

1/52 x 1/51 x 1/53.

When it should be this:

1/52 x 1/51 x 1/50.

## Error

In the section on "Counting Combinations" you have this:

1/52 x 1/51 x 1/53.

When it should be this:

1/52 x 1/51 x 1/50.