Suppose that the math team at your school competes in a regional tournament. The math team has 12 members. Regional teams are made up of 4 people. How many different regional teams are possible?

Question

kropot72 · Answer

You need to find the number of combinations of 12 people taken 4 at a time which is:
$$12C4=\frac{12!}{4! \times 8!}=\frac{12\times11\times10\times9}{4\times3\times2}=you\ can\ calculate$$

highschoolmom2010 · Answer

yea i was unsure of which i needed to use....

highschoolmom2010 · Answer

thanks @kropot72

austinl · Answer

You probably have an $\large{_nC_r}$ button on your calculator :)

highschoolmom2010 · Answer

i dont have  a calculator that has that i have the standard calculator

kropot72 · Answer

You're welcome :)

highschoolmom2010 · Answer

$$\frac{ 11880 }{ 24 }=495$$

austinl · Answer

Yep :)

kropot72 · Answer

Your answer is correct. Good work!