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?  Select:
A) 4 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)+(17-x)+x+2=30   34-2x+x=30   34-x=30   x=4   So 4 members play both badminton and tennis.   4
<result>A</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?