A) 35 paise
B) 40 paise
C) 50 prise
D) 56 paise
Correct Answer: B
Solution :
Let original rate = Rs. x per egg. New rate = 80% of \[x=Rs.\frac{4x}{5}\] Original Quantity for \[Rs\,40.=\frac{40}{x}\] New quantity \[=40\times \frac{5}{4x}=\frac{50}{x}\] \[\therefore \] \[\frac{50}{x}-\frac{40}{x}=20\] \[\Rightarrow \] \[\frac{10}{x}=20\] \[\Rightarrow \] \[x=\frac{10}{20}=\frac{1}{2}\] \[\therefore \] Reduced price \[=80%\,\,\text{of}\,\,Rs.\,\frac{1}{2}\] \[=\frac{4}{5}\times \frac{1}{2}=Rs.\frac{2}{5}\] \[=\frac{2}{5}\times 100=40\,\text{paise}\]
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