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Mathematics 16 Online
OpenStudy (anonymous):

ten people are entered in a race. If there are no ties, how many can the first two places come out? a. 180 b. 90 c. 58 d. 5

OpenStudy (lucaz):

for the 1st place we have ten options, with one person in first place we have 9 options for the second place. 10*9

OpenStudy (anonymous):

so it would be b 90?

OpenStudy (lucaz):

yes

OpenStudy (lucaz):

you can also use the permutation formula

OpenStudy (anonymous):

oh ok, thank you!

OpenStudy (lucaz):

no problem

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