A taiwanese fast food chain wants to introduce its franchises into the western united states ( 28 different states ). Durinng this fiscal year it can open franchises in only 12 of those states.
a. In how many ways can the chain pick the 12 western states in which to open franchises this year ?
b. Next year the chain will complete the process of opening western stat franchises. In how many ways can it designate the 16 western states in which to hold off openins until next year