In a sports club with 30 members, 17 play badminton and 17 play tennis and 2 do not play either. How many members play both badminton and tennis? Answers:	A) 7	B) 6	C) 9	D) 10	E) 11
Let x play both badminton and tennis so 17-x play only badminton and 17-x play only tennis. 2 play none and there are total 30 students. hence,   (17-x)+(17-x)+x+2=30   36-2x+x=30   36-x=30   x=6   So 6 members play both badminton and tennis.   6
<result>B</result>
In a sports club with 30 members, 17 play badminton and 17 play tennis and 2 do not play either. How many members play both badminton and tennis?