There are 46 boys and 30 girls who participated in two extracurricular groups of mathematics and biology respectively. No one participated in at least one (some participated in both). /5), the ratio of the number of girls participating in the biology group to the number of the number participating in the mathematics group is 3:4, and boys account for (5/8) of all the students participating in the biology group, so the number of students who only participate in one of the mathematics groups is How many?
有46名男生和30名女生，分别参加数学和生物两项课外小组，没人至少参加一项(有参加两项的)，女生中只参加数学小组的人数是只参加一项人数的(3/5)，女生中参加生物小组的人数与参加数学小组的人数比是3：4，参加生物小组的全体学生中男生占(5/8)，那么只参加数学小组的一项的学生人数是多少？
<gadget id="calculator">46 - 25</gadget>
<output>21</output>

<gadget id="calculator">21 + 15</gadget>
<output>36</output>

<result>36</result>