there are two groups of students in the sixth grade. there are 45 students in group a, and 55 students in group b. if, on a particular day, 20 % of the students in group a forget their homework, and 40 % of the students in group b forget their homework, then what percentage of the sixth graders forgot their homework?	Choose the most appropriate option:
A) 23 %
B) 25 %
C) 29 %
D) 31 %
E) 36 %
<gadget id="calculator">45 * 20</gadget>
<output>900</output>

<gadget id="calculator">900 / 100</gadget>
<output>9</output>

<gadget id="calculator">55 * 40</gadget>
<output>2_200</output>

<gadget id="calculator">2_200 / 100</gadget>
<output>22</output>

<gadget id="calculator">9 + 22</gadget>
<output>31</output>

<gadget id="calculator">45 + 55</gadget>
<output>100</output>

<gadget id="calculator">31 / 100</gadget>
<output>31/100 = around 0.31</output>

<gadget id="calculator">(31/100) * 100</gadget>
<output>31</output>

<result>D</result>
there are two groups of students in the sixth grade. there are 45 students in group a, and 55 students in group b. if, on a particular day, 20 % of the students in group a forget their homework, and 40 % of the students in group b forget their homework, then what percentage of the sixth graders forgot their homework?
multiply(divide(add(divide(multiply(45, 20), const_100), divide(multiply(55, 40), const_100)), add(45, 55)), const_100)
"number of students in group a = 45 students who forget homework in group a = 20 % of 45 = 9 students number of students in group b = 55 students who forget homework in group b = 40 % of 55 = 22 students total number of students = 45 + 55 = 100 students who forgot homework = 9 + 22 = 31 students percentage of students who forget homework = 31 / 100 * 100 = 31 % answer : d"