five. There are 48 students in class 3. In a quality survey, 12 students got full marks in Chinese, 15 students got full marks in mathematics, 23 got full marks in neither, and how many got full marks in both?
五．3班有48名学生，在一次素质调查问卷中，语文的满分的有12人，数学的满分的有15人，两门都没满分的有23人，两门都满分的有多少人？
<gadget id="calculator">48 - 23</gadget>
<output>25</output>

<gadget id="calculator">15 - 25</gadget>
<output>-10</output>

<gadget id="calculator">12 + (-10)</gadget>
<output>2</output>

<result>2</result>