In a class there are 55 pupil, out of them 10 are in debate only and 18 in singing only. Then how many in both?
Choose one
A) 132  B) 26  C) 17  D) 11  E) 12
Explanation:Total pupil = 55   Debate + Singing = 10 + 18= 
<gadget id="calculator">10 + 18</gadget>
<output>28</output>
28   The intersection for two= 55 â€“ 10 â€“ 28 = 17 play both games.   Answer: 17
<result>C</result>
In a class there are 55 pupil, out of them 10 are in debate only and 18 in singing only. Then how many in both?