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OpenStudy (anonymous):
How many different ways can a president or vice president be chosen from a list of 20people?
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OpenStudy (raden):
for president, we can choice 20 ways and the vice president, just 19 ways multiplication of them = 20 * 19 = ...
OpenStudy (anonymous):
I need to multi both of them also?
OpenStudy (raden):
yes
OpenStudy (anonymous):
your correct 380
OpenStudy (raden):
yup, 380
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