The total cost of an office dinner was shared equally by K of the N employees who attended the dinner . What was the total cost of the dinner ?
(1) Each of the K employees who shared the cost of the dinner paid $19.
(2) If the total cost of the dinner had beed shard equally by K+1 of the N employees who attended the dinner , each of the K+1 employees would have paid $18.
Ans:C
我 選D ?????thanks