Ginger over the course of an average work-week wanted to see how much she spent on lunch daily. On Monday and Thursday,

[Gmat_mission]

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

Source: GMAT Prep

[Scott@TargetTestPrep]

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

Solution:

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

[Brent@GMATPrepNow]

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

Source: GMAT Prep

On Monday and Thursday, she spent $5.43 TOTAL
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