In a class of 39 students 26 play football and play 20 long tennis, if 17 play above, many play neither?	Answers:
A) 6
B) 8
C) 10
D) 12
E) 14
26 + 20 - 17= 
<gadget id="calculator">26 + 20 - 17</gadget>
<output>29</output>
29   39 - 29= 
<gadget id="calculator">39 - 29</gadget>
<output>10</output>
10 play neither   Answer is 10
<result>C</result>
In a class of 39 students 26 play football and play 20 long tennis, if 17 play above, many play neither?