Answer
Sample:
"In how many ways can a three-member committee be formed from a group of seven students?"
Work Step by Step
Combination problems involve:
$\bullet$Selections of r items from a set of n items,
$\bullet$Where any item can be chosen only once and
$\bullet$Where the order of the selections is unimportant.
Sample:
"In how many ways can a three-member committee be formed from a group of seven students?"
(Selecting r=3 out of n=7 students ... in $ {}_{7}C_{3}$ ways)
