Xiaohua got 19 questions, 12 questions and 17 questions right in three oral calculations. On average, how many questions are correct each time.
小华三次口算分别算对了19题、12题、17题．平均每次算对了多少题．
<gadget id="calculator">19 + 12 + 17</gadget>
<output>48</output>

<gadget id="calculator">48 / 3</gadget>
<output>16</output>

<result>16</result>