The ratio of males to females in a class is 2:3. The career preferences of the students in the class are represented in a circle graph. If the area of the graph allocated to each career preference is proportional to the number of students who have that career preference, how many degrees of the circle should be used to represent a career that is preferred by one-fourth of the males and one-half of the females in the class?
Pick one.
A) 128 B) 136 C) 144 D) 152 E) 160
1/4*2/5 + 1/2*3/5 = 2/20 + 6/20 = 2/5   The number of degrees is  2/5 * 360= 
<gadget id="calculator"> 2/5 * 360</gadget>
<output>144</output>
144 degrees   The answer is 144.
<result>C</result>
The ratio of males to females in a class is 2:3. The career preferences of the students in the class are represented in a circle graph. If the area of the graph allocated to each career preference is proportional to the number of students who have that career preference, how many degrees of the circle should be used to represent a career that is preferred by one-fourth of the males and one-half of the females in the class?