There are 600 boys in a hostel. Each plays either hockey or football or both. If 75% play hockey and 50% play football, how many play both?
Choose the correct answer:
A) 120	B) 150	C) 200	D) 180	E) 160
n(A) = 75*600/100= 
<gadget id="calculator">75*600/100</gadget>
<output>450</output>
450   n(150)= 50*600/100= 
<gadget id="calculator">50*600/100</gadget>
<output>300</output>
300   n(AU150)= 600   n(An150) = 450+300-600= 
<gadget id="calculator">450+300-600</gadget>
<output>150</output>
150   Answer is 150
<result>B</result>
There are 600 boys in a hostel. Each plays either hockey or football or both. If 75% play hockey and 50% play football, how many play both?