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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