Mathematics, 08.10.2019 16:10 jackienassiri
The serial number on a bill consists of a letter followed by seven 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 digits can be repeated. (c) the letters are nonrepeated consonants and the digits can be repeated. (let y be a consonant.)
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