A class has 30 boys and 20 girls. If 20 percent of the boys and 25 percent of the girls got "A" grade, what percent of the total number of students got "A" grade. Choose the correct choice from the following choices.
A) 5.5%	B) 16.5%	C) 20.0%	D) 49.5%	E) 51.0%
20% of 30 boys, hence  0.20 *30= 
<gadget id="calculator"> 0.20 *30</gadget>
<output>6</output>
6 boys got "A" grade.   25% of 20 girls, hence 0.25*20= 4 girls got "A" grade.   Thus (Girls + boys) /(total) = (4 + 6)/(30 + 20) = 10/50 = 20% "A" grade students   Answer: 20.0%.
<result>C</result>
A class has 30 boys and 20 girls. If 20 percent of the boys and 25 percent of the girls got "A" grade, what percent of the total number of students got "A" grade.