Of the 400 members at a health club, 280 use the weight room and 300 use the pool. If at least 60 of the members do not use either, then the number of members using both the weight room and the pool must be between:
Choose the correct choice from the following answers
A) 200 to 260  B) 240 to 280  C) 220 to 260  D) 220 to 300  E) 40 to 100
W=280   P=300   ALL=400   N(NEITHER)=AT LEAST 60   240 to 280OTH=?   W+P-240 to 280OTH+N=ALL   280+300-240 to 280OTH+60=400   240 to 280OTH=240   now pay attention to the fact, that both at most can be 280, since W=280   240 to 280
<result>B</result>
Of the 400 members at a health club, 280 use the weight room and 300 use the pool. If at least 60 of the members do not use either, then the number of members using both the weight room and the pool must be between: