In a class of 50 students, 20 play Tennis, 15 play Cricket and 11 play Football. 7 play both Tennis and Cricket, 4 play Cricket and Football and 5 play Tennis and football. If 18 students do not play any of these given sports, how many students play exactly two of these sports? Choose the correct choice from the following options:
A) 10	B) 20	C) 25	D) 30	E) 40
{Total}={Hockey}+{Cricket}+{Football}-{HC+CH+HF}+{All three}+{Neither} For more check ADVANCED OVERLAPPING SETS PROBLEMS   50=20+15+11-(7+4+5)+{All three}+18 --&gt; {All three}=2;   Those who play ONLY Hockey and Cricket are   7-2= 
<gadget id="calculator">  7-2</gadget>
<output>5</output>
5;   Those who play ONLY Cricket and Football are  4-2= 
<gadget id="calculator"> 4-2</gadget>
<output>2</output>
2;   Those who play ONLY Hockey and Football are 5-2= 
<gadget id="calculator">5-2</gadget>
<output>3</output>
3;   Hence, 5+2+3=10 students play exactly two of these sports.   {Total}={Hockey}+{Cricket}+{Football}-{HC+CH+HF}+{All three}+{Neither} For more check ADVANCED OVERLAPPING SETS PROBLEMS   50=20+15+11-(7+4+5)+{All three}+18 --&gt; {All three}=2;   Those who play ONLY Hockey and Cricket are   7-2= 
<gadget id="calculator">  7-2</gadget>
<output>5</output>
5;   Those who play ONLY Cricket and Football are  4-2= 
<gadget id="calculator"> 4-2</gadget>
<output>2</output>
2;   Those who play ONLY Hockey and Football are 5-2= 
<gadget id="calculator">5-2</gadget>
<output>3</output>
3;   Hence, 5+2+3=10 students play exactly two of these sports.   10nswer 10
<result>A</result>
In a class of 50 students, 20 play Tennis, 15 play Cricket and 11 play Football. 7 play both Tennis and Cricket, 4 play Cricket and Football and 5 play Tennis and football. If 18 students do not play any of these given sports, how many students play exactly two of these sports?