Trevor buys three bouquets of carnations. The first included 9 carnations, and the second included 14 carnations. If the average number of carnations in the bouquets is 12, how many carnations were in the third bouquet?
There are 3 bouquets.
The total is the average times the number of bouquets, or 12*3=<<12*3=36>>36.
There are 9+14=<<9+14=23>>23 accounted for.
The third included 36-23=<<36-23=13>>13 carnations.
#### 13