Question

What is the average number of boys who visited Kolkata, Varanasi and Jodhpur together?

• A. 110
• B. 122
• C. 101
• D. 104
• E. None of these

Answer 1

The correct option is A 110

From the given information, we can get the following table:-
$\begin{array}{ccc}City& Boys& Girls\\ & =120\times 45\%=540& 660\\ Delhi& 540\times 20\%=108& 660\times \frac{2}{5}=264\\ Kolkata& [540-(102+108+216\left)\right]/2=57& \left[\right(660-(264+198+132)]\times \frac{2}{3}=44\\ Varanasi& 57& 660-(264+198+132+44)=22\\ Mumbai& 300-198=102& 660\times 30\%=198\\ Jodhpur& 540\times 40\%=216& \frac{264}{2}=132\end{array}$
Average number of boys, who visited Kolkata, Varanasi and Jodhpur together $=\frac{57+57+216}{3}=110$