How to find the # of possilibities?

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To find the number of possibilities for a combination of numbers and letters in the format number-letter-number, you multiply the options for each position. There are 10 possibilities for the first number, 26 for the letter, and 10 for the second number. Therefore, the total number of combinations is calculated as 10 * 26 * 10, resulting in 2600 possible combinations. The distinction between permutations and combinations is noted, but the focus remains on the ordered nature of the sequence. This method effectively determines the total possibilities for the specified format.
Gary King
If I have a combination of numbers and letters (number-letter-number - examples: 1j5, 3f5) then how can I find the number of possibilities?

So, number-10 possibilities, letter-26 possibilities, number-10 possibilities.

Thanks!
 
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If we're talking permuataions (edited to add I know you siad combinations which are different, but you implied some sort of order) here it's simply 10*26*10 = 2600
 
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ah yes, it's all coming back to me now :) thanks
 

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