SOLUTION
Step 1 :
In this question, we are told that each plate contains
3 letters and 3 numbers.
The numbers can repeat, but the letters cannot repeat.
Step 2 :
For us to find the number of license plates that can be made,
we have that:
[tex]3\text{ x 3 x 3 x 3 }![/tex][tex]3\text{ x 3 x 3 x 3 x 2 x 1 =162 license plates.}[/tex]CONCLUSION :
The final answer is 162 license plates.