To determine whether the situation describes the Permutation or Combination.
Explanation:
It is given that,
1) The junior class selects 3 representatives to the student council.
Since, there is no order.
Then, it is a combination.
2) The swim team must choose a captain and co-captain.
Since there is an order, the swim team must choose.
Then, it is a Permutation.
3) A sandwich made with 3 of the 25 available toppings.
Since there is no order.
Then, it is a combination.
4) A locker has a 5digit code that must be entered to open it.
Since there is an order.
Then, it is a Permutation.
