A) 4% increase
B) 4% decrease
C) 5% increase
D) 5% decrease
Correct Answer: B
Solution :
Sol. [b] Increase in water tax (x) = 20% Decrease in water consumption (y) = 20% \[\therefore \] Net change in monthly expenditure \[\left[ x-y+\,\frac{(x)(-y)}{100} \right]\]% \[\left( 20-20+\frac{(20)(-20)}{100} \right)\]% \[=\,-\,\frac{400}{100}\,\]% = - 4% \[\therefore \]There is net decrease of 4% in monthly expenditure.You need to login to perform this action.
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