A) 600
B) 650
C) 700
D) 750
Correct Answer: A
Solution :
[a] Clearly 35% students failed in Maths; 40% failed in History and 60% failed in both subjects. Thus the number of students who actually failed in one or both subjects \[=\left( 35+40-60 \right)%\]i.e. 15% of total students. \[\therefore 15%\,\,of\,\,x=90\] So, \[x=\frac{90\times 100}{15}=600\]You need to login to perform this action.
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