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Mathematics 13 Online
OpenStudy (anonymous):

How many different ways can a president or vice president be chosen from a list of 20people?

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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