<PRE><B>Question 143959</B>
Assume number 0-9 and letters A-Z (caps only)

Then you have 10 numbers and 26 letters

Watch this video, pay attention to the ones near the end. http://collabvsl.wetpaint.com/page/Basic+Probability

You have 36 choices and a license plate with 6 spaces

XXX-XXX

36* 36*36*36*36*36 = {{{36^6}}}

How does this change if the plates look like
###-CCC   (# is number and A is letter)
10*10*10 * 26*26*26 = {{{10^3 * 26^3}}}

If the letters are allowed to be a-z, A-Z or include any other special characters (like !* or some such), then the number of letter goes up. The same process applies. The exponents will stay the same, but the base will go up accordingly. 

make sense?

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