Ginger over the course of an average work-week wanted to see how much she spent on lunch daily. On Monday and Thursday, she spent $5.43 total. On Tuesday and Wednesday, she spent $3.54 on each day. On Friday, she spent $7.89 on lunch. What was her average daily cost?
a. $3.19
b. $3.75
c. $3.90
d. $4.08
e. $4.23
Answer: D
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Ginger over the course of an average work-week wanted to see how much she spent on lunch daily. On Monday and Thursday,
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Solution:Gmat_mission wrote: ↑Wed Mar 24, 2021 8:13 amGinger over the course of an average work-week wanted to see how much she spent on lunch daily. On Monday and Thursday, she spent $5.43 total. On Tuesday and Wednesday, she spent $3.54 on each day. On Friday, she spent $7.89 on lunch. What was her average daily cost?
a. $3.19
b. $3.75
c. $3.90
d. $4.08
e. $4.23
Answer: D
The total she spent on lunch for the 5 days is:
5.43 + 3.54 x 2 + 7.89 = $20.40
Therefore, the average amount of money she spent on lunch per day is:
20.40/5 = $4.08
Answer: D
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On Monday and Thursday, she spent $5.43 TOTALGmat_mission wrote: ↑Wed Mar 24, 2021 8:13 amGinger over the course of an average work-week wanted to see how much she spent on lunch daily. On Monday and Thursday, she spent $5.43 total. On Tuesday and Wednesday, she spent $3.54 on each day. On Friday, she spent $7.89 on lunch. What was her average daily cost?
a. $3.19
b. $3.75
c. $3.90
d. $4.08
e. $4.23
Answer: D
Source: GMAT Prep
So, our running total = $5.43
On Tuesday and Wednesday, she spent $3.54 on each day
Running total = $5.43 + $3.54 + $3.54
On Friday, she spent $7.89 on lunch.
Running total = $5.43 + $3.54 + $3.54 + $7.89 = $20.40
What was her average daily cost?
The average cost over the 5 days = (total amount spent)/5
= $20.40/5
= $4.08
Answer: D
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