The mathematics interest group held a test with a total of 15 questions. It was stipulated that 8 points were awarded for each correct question, and 4 points were deducted for each wrong question. Xiaoying scored 72 points in total. How many questions did she get right?
数学兴趣小组举行一次测试，全卷共15题，规定每做对一题得8分，做错一题倒扣4分．小英共得72分，她做对了多少题．
<gadget id="calculator">8 * 15</gadget>
<output>120</output>

<gadget id="calculator">120 - 72</gadget>
<output>48</output>

<gadget id="calculator">8 + 4</gadget>
<output>12</output>

<gadget id="calculator">48 / 12</gadget>
<output>4</output>

<gadget id="calculator">15 - 4</gadget>
<output>11</output>

<result>11</result>