A) \[90\frac{1}{2}%\]
B) \[87\frac{1}{4}%\]
C) \[87\frac{1}{2}%\]
D) \[90%\]
Correct Answer: C
Solution :
(c) Out of 8 parts, seven is shaded \[\Rightarrow \]\[\frac{7}{8}\times 100%=87\frac{1}{2}%\] Mind of a mathematician: Mathematical Ingenuity: \[1=100%\] \[{}^{1}/{}_{8}=12\frac{1}{2}%\] \[\therefore \]\[{}^{7}/{}_{8}=1-\frac{1}{8}=87\frac{1}{2}%\] This calculation should happen automatically to a thoughtful student.
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