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Mathematics 15 Online
OpenStudy (anonymous):

What if the Value of:

OpenStudy (anonymous):

equation coming up

OpenStudy (anonymous):

\[_7{P}_{3}\]

OpenStudy (anonymous):

that last number is a 3

OpenStudy (anonymous):

a. 21 b. 150 c. 210 d. 375

OpenStudy (lgbasallote):

7P3? my latex reader doesnt read well lol

OpenStudy (anonymous):

yes lgba

OpenStudy (lgbasallote):

i believe nPr means \[\frac{n!}{(n-r)!}\]

OpenStudy (lgbasallote):

therefore 7P3 means \[\frac{7!}{(7-3)!}\]

OpenStudy (anonymous):

umm ok so what do i do from there

OpenStudy (lgbasallote):

expand \[\frac{7!}{4!} = \frac{7 \times 6 \times 5 \times 4!}{4!}\]

OpenStudy (anonymous):

ok just a min

OpenStudy (anonymous):

C!

OpenStudy (anonymous):

:)

OpenStudy (lgbasallote):

yep

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