Question

You asked your classmates to name their favorite type of music. You found that 12 students like rock, 8 like rap, 6 like R&B, and 4 like jazz. Suppose you made a pie chart to display the data. How many degrees of the circle should represent rock music?

Answer 1

first we should write the total numbers:
12+8+6+4=30
then we should divide the number 30 by 360(because the pie chart is 360 degrees):
$360 \div 30 = 12$

now we should multiply 12(the number of students who likes rock) by 12
$12 \times 12 = 144$
the answer is 144 degrees