There are 600 boys in a hostel. Each plays either hockey or football or both. If 75% play hockey and 35% play football, how many play both?
Choices.
A) 120  B) 150  C) 200  D) 180  E) 60
n(A) = 75*600/100= 
<gadget id="calculator">75*600/100</gadget>
<output>450</output>
450   n(B)= 35*600/100= 
<gadget id="calculator">35*600/100</gadget>
<output>210</output>
210   n(AUB)= 600   n(AnB) = 450+210-600= 
<gadget id="calculator">450+210-600</gadget>
<output>60</output>
60   Answer is 60
<result>E</result>
There are 600 boys in a hostel. Each plays either hockey or football or both. If 75% play hockey and 35% play football, how many play both?