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=
<gadget id="calculator">12*3</gadget>
<output>36</output>
36.
There are 9+14=
<gadget id="calculator">9+14</gadget>
<output>23</output>
23 accounted for.
The third included 36-23=
<gadget id="calculator">36-23</gadget>
<output>13</output>
13 carnations.

<result>13</result>