Question 1077762
The form of each serial number is XXnnnn

For XX you have 6P2 = (6*5) = 30  possibilities 
For nnnn there are 10P4 = (10*9*8*7) = 5040 possibilities

Since the alpha and numeric portions are independent, we need to multiply the above two numbers:
30*5040 = {{{ highlight(151200) }}} total possible serial numbers