garykids305
garykids305
05.05.2020 • 
Mathematics

The serial number on a bill consists of a letter followed by nine digits and then a letter. How many different serial numbers are possible, given the following conditions?
A, Letters and digits cannot be repeated
B, letters and and digits can be repeated
C, The letters are non-repeated consonants and the digits can be repeated. ( Let y be a consonant)


The serial number on a bill consists of a letter followed by nine digits and then a letter. How many

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