Twenty percent of the women in a college class are science majors, and the non-science majors make up 60% of the class. What percentage of the men are science majors if 40% of the class are men?  Answers:
A) 40%	B) 50%	C) 60%	D) 70%	E) 80%
Science majors make up 0.4 of the class.   60% of the class are women and   0.2*0.6= 
<gadget id="calculator">  0.2*0.6</gadget>
<output>0.12</output>
0.12 of the class are female science majors.   Then 0.28 of the class are male science majors.   0.4x= 0.28   x = 0.7 = 70%   The answer is 70%.
<result>D</result>
Twenty percent of the women in a college class are science majors, and the non-science majors make up 60% of the class. What percentage of the men are science majors if 40% of the class are men?