A) 89
B) 90
C) 87
D) 88
Correct Answer: B
Solution :
[b] Marks of Supriyo \[=x\] marks Acceding to question Mahuya marks = Supriyo marks \[-\,10%\] of Supriyo marks \[81=x-10%\,\,of\,\,x\Rightarrow x\left( 1-\frac{10}{100} \right)\] \[81=\frac{9}{10}x\,\Rightarrow \,\,\,\frac{810}{9}=\,x\] \[\therefore \,x=90\,marks\]You need to login to perform this action.
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