Of the students at a certain high school, 100 percent took a course in algebra or geometry and 20 percent took courses in both. If the percent of students who took a course in algebra was 2 times the percent of students who took a course in geometry, what percent of the students took a course in algebra but not geometry?	Choose one:
A) 50%	B) 60%	C) 45%	D) 40%	E) 35%
You can also just use the formula   n(A or B) = n(A) + n(B) - n(A and B)   100 = 2X + X - 20   X = 40   2X = 80   This is the number of people who took algebra including those who took both. To get the number of people who took only algebra, 80 - 20 = 60%   Answer (60%)
<result>B</result>
Of the students at a certain high school, 100 percent took a course in algebra or geometry and 20 percent took courses in both. If the percent of students who took a course in algebra was 2 times the percent of students who took a course in geometry, what percent of the students took a course in algebra but not geometry?