10 play kabadi, 20 play kho kho only, 5 play both gmaes. Then how many in total?
Choices:  A) 30  B) 35  C) 38  D) 40  E) 45
10 play kabadi =&gt;n(30)=10,   5 play both gmaes.=&gt; n(30nB)=5   20 play kho kho only,=&gt;n(B)=n(B only)+n(30nB)=20+5= 
<gadget id="calculator">20+5</gadget>
<output>25</output>
25   Total=&gt; n(30UB)= n(30)+n(B)-n(30nB)   = 10+25-5= 
<gadget id="calculator">10+25-5</gadget>
<output>30</output>
30   30NSWER:30
<result>A</result>
10 play kabadi, 20 play kho kho only, 5 play both gmaes. Then how many in total?