Mean daily profit made by a shopkeeper, in a month of 30, days, was Rs.,350. If mean profit for firs

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The mean daily profit made by a shopkeeper, in a month of $30\, days,$ was $Rs.\,350.$ If the mean profit for the first $15\, days$ was $Rs.\, 275,$ then the mean profit for the last $15\, days$ would be (in $Rs\,$)

A

$200$

B

$275$

C

$350$

D

$425$

Solution

Total profit for $30$ days $=30 \times 350$

$=Rs.\, 10500$

Profit for the first $15$ days $=15 \times 275=Rs.\, 4125$ Profit for the last $15\, days$ $=Rs.\, 10500-4125=Rs.\, 6375$

$\therefore \quad$ Average profit for the last $15$ days $=Rs.\, \frac{6375}{15}=₹ 425$

Standard 13

Quantitative Aptitude

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