### Home > A2C > Chapter 12 > Lesson 12.4.2 > Problem 12-190

12-190.

In the past, many states had license plates composed of three letters followed by three digits (? Homework Help ✎

Since repetition is allowed, the total number of license plates of the first type is

The total number of license plates of the second type is

Find the difference.

Find the number of license plates containing .