In a sports club with 30 members, 17 play badminton and 18 play tennis and 2 do not play either. How many members play both badminton and tennis?	Choose the correct choice from the following answers:
A) 7  B) 8  C) 9  D) 10  E) 11
Let x play both badminton and tennis so 17-x play only badminton and 19-x play only tennis. 2 play none and there are total 30 students. hence,   (17-x)+(18-x)+x+2=30   37-2x+x=30   37-x=30   x=7   So 7 members play both badminton and tennis.   7
<result>A</result>
In a sports club with 30 members, 17 play badminton and 18 play tennis and 2 do not play either. How many members play both badminton and tennis?