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(26) x (26) x (10,000) = 6,760,000
There are 26 possible letters and 10 possible numbers. The number of license plates possible is then 26*26*10*10*10*10 = 6760000.
1757600
11,232,000
If it alternates and you start with a letter, then there are 11,232,000 permutations. Then if you start with a number and alternate, there are another 11,232,000 permutations, for a total of 22,464,000 permutations. If you exclude the letters I, S, B, and O (because they look kind-of like 1, 5, 8, & 0 - kind-of important on license plates) then you are down to 6,652,800 & 13,305,600 respectively.
How many license plates can be made using either two uppercase English letters followed by four digits or two digits followed by four uppercase English letters?
(26) x (26) x (10,000) = 6,760,000
There are 26 possible letters and 10 possible numbers. The number of license plates possible is then 26*26*10*10*10*10 = 6760000.
If all letters and numbers are allowed, the possibilities are 26x26x10x10x10x10. So: 6760000 different plates.
12
it 26 to the power 4 and then 99 for the numbers figure that out add the two together
35,152,000 (assuming that 000 is a valid number, and that no letter combinations are disallowed for offensive connotations.) Also, no letters are disallowed because of possible confusion between letters and numbers eg 0 and O.
Multiply the possibilities for each digit: 26 * 26 * 26 * 10 * 10 * 10 = 17,576,000
1757600
Any three letters, in any order, including repeated letters gives 263 combinations each of which could have one of 9 digits so 26 x 26 x 26 x 9 ie 158184 different plates.
There are 676,000 ways to make the license plates.
11,232,000