SOLUTION: The average daily income for a certain number of days is rs 25. Excluding the income of rs 54 for
a certain day, the average income becomes Re 1 less. Find the number of days
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-> SOLUTION: The average daily income for a certain number of days is rs 25. Excluding the income of rs 54 for
a certain day, the average income becomes Re 1 less. Find the number of days
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Question 1055438: The average daily income for a certain number of days is rs 25. Excluding the income of rs 54 for
a certain day, the average income becomes Re 1 less. Find the number of days
for which the average is Rs 25. Found 2 solutions by josmiceli, MathTherapy:Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = total income for the
certain number of days
Let = the certain number of days
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given:
(1)
(2)
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(2)
(2)
(2)
Plug this result back into (2)
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(2)
(2)
(2)
(2)
(2)
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question:
Find if the average is 25
(1)
(1)
(1)
(1)
For 30 days, the average is Rs 25
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Check my math & maybe get another opinion, too
You can put this solution on YOUR website!
The average daily income for a certain number of days is rs 25. Excluding the income of rs 54 for
a certain day, the average income becomes Re 1 less. Find the number of days
for which the average is Rs 25.
Let number of days be D
Then total income is: 25D
Excluding Rs 54 makes the new income: 25D – 54, and the number of days: D – 1
We then get the following AVERAGE DAILY-INCOME equation:
25D – 54 = 24(D – 1) -------- Cross-multiplying
25D – 54 = 24D – 24
25D – 24D = - 24 + 54
