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# A shop keeper earned Rs.504 in 12 days. His average income for the fir

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Math Expert
Joined: 02 Sep 2009
Posts: 59587
A shop keeper earned Rs.504 in 12 days. His average income for the fir  [#permalink]

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21 Feb 2019, 00:22
00:00

Difficulty:

25% (medium)

Question Stats:

88% (01:32) correct 13% (01:35) wrong based on 8 sessions

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A shop keeper earned Rs.504 in 12 days. His average income for the first four days was Rs.40 a day. His average income for the remaining days is:

A. Rs.40
B. Rs.42
C. Rs.43
D. Rs.45
E. Rs.46

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Intern
Joined: 19 Feb 2019
Posts: 20
Re: A shop keeper earned Rs.504 in 12 days. His average income for the fir  [#permalink]

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21 Feb 2019, 00:31
For the first four days, the average is Rs. 40 a day. So he earns a total of 40x4=160 Rs. During these 4 days. Since his total earning during the 12 day period is Rs. 504, we can see that his earning during the remaining 8 days will be 504-160 = 344. This average will be 344/8 = 43 = C

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Joined: 18 Aug 2017
Posts: 5432
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: A shop keeper earned Rs.504 in 12 days. His average income for the fir  [#permalink]

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21 Feb 2019, 09:10
Bunuel wrote:
A shop keeper earned Rs.504 in 12 days. His average income for the first four days was Rs.40 a day. His average income for the remaining days is:

A. Rs.40
B. Rs.42
C. Rs.43
D. Rs.45
E. Rs.46

total 12 days
so for 4 days total = 160
504-160 ; 344 and avg of 8 days ; 43 IMO C
Re: A shop keeper earned Rs.504 in 12 days. His average income for the fir   [#permalink] 21 Feb 2019, 09:10
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