Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 特雷弗买了几束康乃馨花。第一束有9朵康乃馨；第二束有14朵康乃馨；第三束有13朵康乃馨。这些花束的平均康乃馨数量是多少？


### Response:
 总和是9+14+13=<<9+14+13=36>>36。
有3束花。
平均数是36/3=<<36/3=12>>12。