There are 60 students in Class 51, 20 students in the Chinese interest group, and 28 students in the mathematics interest group. There are 10 people who participated in both the language and mathematics groups, and how many people did not participate in these two interest groups.
五1班有学生60人，参加语文兴趣小组的有20人，参加数学兴趣小组的有28人．语、数小组都参加的有10人，这两个兴趣小组都没有参加的有多少人．
<gadget id="calculator">28 - 10</gadget>
<output>18</output>

<gadget id="calculator">20 + 18</gadget>
<output>38</output>

<gadget id="calculator">60 - 38</gadget>
<output>22</output>

<result>22</result>