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OpenStudy (anonymous):
A key code must contain 4 numerals. There are 10 numerals available. Using these numerals, how many different key codes may be created?
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Mehek (mehek14):
\(10*9*8*7\) multiply that
OpenStudy (anonymous):
5040 thank you
Mehek (mehek14):
your welcome \(\ddot\smile\)
OpenStudy (anonymous):
A fish tank at a pet store has 10 goldfish. In how many different ways can Brian choose 3 goldfish to buy? @Mehek14
Mehek (mehek14):
same as the other one \(10*9*8\)
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OpenStudy (anonymous):
If you can use the numerals more than once you should use 10^4
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