Question

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

• A. 82
• B. 77
• C. 86
• D. 76
• E. None of these

Answer 1

The correct option is B 77

Total number of boys $=\frac{800\times 54}{100}=432$
Mumbai $=192-92=100$
Varanasi = $\frac{432}{4}=108$
Ajmer $=101$
Delhi = $(432-309)\times \frac{2}{3}=82$
Jodhpur $=(432-309-82)=41$
Total number of girls $=800-432=368$
Mumbai $=\frac{1}{4}\times 368=92$
Delhi $=92$
Jodhpur $=46$
Ajmer $=(368-230)\times \frac{5}{6}=115$
Varanasi $=368-230-115=23$
Required average $=\frac{82+108+41}{3}=\frac{231}{3}=77$