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Um, does anyone also understand this? Abelardo wants to create several different 7-character screen names. He wants to use arrangements of the first 3 letters of his name (abe), followed by arrangements of 4 digits in 1984, the year of his birth. How many different screen names can he create in his way?
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Total number of screen names possible: 6*24 = 144
wait, but how did u get the numbers 6 and 24?
# of arrangements of abe: 3! = 6 ---- # of arrangements of 1984: 4! = 24
do u get it?
oh ok
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thank-you so much :)
no prob =D
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