There are 48 people in a class, 26 of them take part in the mathematics competition, 24 take part in the composition competition, 12 take part in both, and how many people take part in neither.
一班有48人，其中26人参加数学竞赛，24人参加作文竞赛，12人两项都参加，有多少人两项都不参加．
<gadget id="calculator">26 + 24</gadget>
<output>50</output>

<gadget id="calculator">50 - 12</gadget>
<output>38</output>

<gadget id="calculator">48 - 38</gadget>
<output>10</output>

<result>10</result>