Compared to January, the total expenditure on carnations in March

Increased by 6.27%

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Decreased by 6.64%

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Increased by 6.69%

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Decreased by 7.11%

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Solution

The correct option is C Increased by 6.69%
Average consumer expenditure on roses & carnations = $\frac{E x p e n d i t u r e o n r o s e s + E x p e n d i t u r e o n c a r n a t i o n s}{70, 000}$
For January $\Rightarrow$ 47.4 $\times$ 70,000=1136916 + expenditure on carnations
Expenditure on carnations = 2181084
For March $\Rightarrow$ 49.5 $\times$ 70,000 = 1137915 + expenditure on carnations
Expenditure on carnations = 2327085
Expenditure on carnations in March is greater than that in January.
% increase $= \frac{2327085 - 2181084}{2181084}$
$= \frac{232 - 218}{218} \times 100 = 6.69 %$

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