In a sports club with 42 members, 20 play badminton and 23 play tennis and 6 do not play either. How many members play both badminton and tennis? Select the correct option:
A) 3
B) 5
C) 6
D) 7
E) 8
20+23= 
<gadget id="calculator">20+23</gadget>
<output>43</output>
43   but where as total number is   42-6= 
<gadget id="calculator">  42-6</gadget>
<output>36</output>
36   therefore answer is   43-36= 
<gadget id="calculator">  43-36</gadget>
<output>7</output>
7   Hence Answer is 7
<result>D</result>
In a sports club with 42 members, 20 play badminton and 23 play tennis and 6 do not play either. How many members play both badminton and tennis?