Question 1168333
How many license plates are possible if each plate must have three letters followed by three digits and repeats are not allowed?
solution 
in one plate three letters three digit no repeats
1ltr    2 ltrs     3ltrs     1st digit   2nd digit    3rd digit 
26 x     25x        24x       10x          9x           8
26x25x24x10x9x8=11232000
answer 11,232,000 number of license plate with out repeats