There are 20 students on the school's student council. A special homecoming dance committee is to be formed by randomly selecting 6 students from student council. How many possible committees can be formed?

Question

cwrw238 · Answer

20C6  - the number of combinations of 6 from 20

anonymous · Answer

ok do you know how to start it?

cwrw238 · Answer

do you know the formula for this?

anonymous · Answer

no i do not

cwrw238 · Answer

the number of combinations of  r from n:

nCr  =    n!
          ------
          (n - r)! r!

where ! means factorial

eg  3! = 3*2*1

anonymous · Answer

thank you!

cwrw238 · Answer

yw - if u need any more help please ask