Jamie bought 23 cases of soda for her party. each case contains a dozen cans.

a) if her guests drank 223 cans of soda, how many cases were used? (express your answer as a mixed number)

b) how many sodas were left over ?

c) how many cases of soda were left over ? (express your answer as a mixed number)

B because you have to know how many their are left 

23x12-276 cans of sodas total                                                                                 ,(A) 276-223=53 so12x4=48 4 cases of soda and 5 can are left                             (B)53 sodas were left over                                                                                      (C)there were 53 cans of soda left so 12divided by 3=4cases left plus 5 additional cans so the answer is 4 cases that were left over