There are two groups of students in the sixth grade. There are 20 students in group A, and 80 students in group B. If, on a particular day, 20% of the students in group A forget their homework, and 15% of the students in group B forget their homework, then what percentage of the sixth graders forgot their homework?	Choose the correct option:
A) 13%	B) 14%	C) 15%	D) 16%	E) 17%
Number of students in group A = 20   students who forget homework in group A = 20 % of 20 = 4 students   Number of students in group B = 80   students who forget homework in group B = 15 % of 80 = 12 students   Total number of students = 20 + 80= 
<gadget id="calculator">20 + 80</gadget>
<output>100</output>
100   students who forgot homework= 4 + 12= 
<gadget id="calculator">4 + 12</gadget>
<output>16</output>
16 students   percentage of students who forget homework= 16/100 * 100= 
<gadget id="calculator">16/100 * 100</gadget>
<output>16</output>
16%   Answer: 16%
<result>D</result>
There are two groups of students in the sixth grade. There are 20 students in group A, and 80 students in group B. If, on a particular day, 20% of the students in group A forget their homework, and 15% of the students in group B forget their homework, then what percentage of the sixth graders forgot their homework?