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(C) Total expenditure of the man in a year is calculated as follows:Expenditure for the first $4$ months $= 4 	imes 1800 = Rs. 7200$.Expenditure for

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$2400$

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(C) Total expenditure of the man in a year is calculated as follows:Expenditure for the first $4$ months $= 4 	imes 1800 = Rs. 7200$.Expenditure for the next $8$ months $= 8 	imes 2000 = Rs. 16000$.Total annual expenditure $= 7200 + 16000 = Rs. 23200$.Total annual income is the sum of total expenditure and annual savings:Total annual income $= 23200 + 5600 = Rs. 28800$.Average monthly income $= \frac{	ext{Total annual income}}{12} = \frac{28800}{12} = Rs. 2400$.

$A$ man spends $Rs. 1800$ monthly on an average for the first four months and $Rs. 2000$ monthly for the next eight months and saves $Rs. 5600$ a year. His average monthly income is (in $Rs.$)

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