The number of students who took both History and Geography among other subjects was
A) 62
B) 63
C) 65
D) 66
Correct Answer: B
Solution :
The required set of students is denoted by the regions common to the circles representing History and Geography. \[\therefore \]Required number \[=\left( 20\text{ }+13\text{ }+12\text{ }+\text{ }18 \right)=63.\]
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