There are 600 boys in a hostel. Each plays either hockey or football or both. If 75% play hockey and 45% play football, how many play both?  Pick one:	A) 120	B) 150	C) 200	D) 180	E) 160
n(120) = 75*600/100= 
<gadget id="calculator">75*600/100</gadget>
<output>450</output>
450   n(B)= 45*600/100= 
<gadget id="calculator">45*600/100</gadget>
<output>270</output>
270   n(120UB)= 600   n(120nB) = 450+270-600= 
<gadget id="calculator">450+270-600</gadget>
<output>120</output>
120   120nswer is 120
<result>A</result>
There are 600 boys in a hostel. Each plays either hockey or football or both. If 75% play hockey and 45% play football, how many play both?