Average expenditure of a man for first five months is Rs., 120 and for next seven months is Rs. ,130

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The average expenditure of a man for the first five months is $Rs.\, 120$ and for the next seven months is $Rs. \,130$ . His monthly average income in $Rs.$ if he saves $Rs. \,290$ in that year, is

A

$160$

B

$170$

C

$150$

D

$140$

Solution

Total expenditure for first $5$ months $=120 \times 5=600$ Rs.

Total expenditure for next $7$ months $=130 \times 7=910$ Rs.

Total income = Total expenditure of the whole year + saving

$=600+910+290=1800 \,Rs.$

Monthly average income $=\frac{1800}{12}=150$ $Rs.$

Standard 13

Quantitative Aptitude

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