Average expenditure of a man for first five months is Rs., 3600 and for next seven months it is Rs.,

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4.Average

medium

The average expenditure of a man for the first five months is $Rs.\, 3600$ and for next seven months it is $Rs.\, 3900 .$ If he saves $Rs.\, 8700$ during the $year,$ his average income per $month$ is (in $Rs.$)

A

$4500$

B

$4200$

C

$4050$

D

$3750$

Solution

Total expenditure for the first five months

$=5 \times 3600=Rs.\, 18000$

Total expenditure for the next seven months

$=7 \times 3900=Rs.\, 27300$

Savings $=Rs.\, 8700$

Total income during the year

$=18000+27300+8700=Rs.\, 54000$

$\therefore \quad$ Average income per month $=\frac{54000}{12}=Rs.\, 4500$

Standard 13

Quantitative Aptitude

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