Source: Official Guide for the GMAT 13th Ed. Problem Solving; #145 Official Guide for the GMAT 2015 14th Ed. Problem Solving; #145

1

In a small snack shop, the average

In a small snack shop, the average (arithmetic mean) revenue was $400 per day over a 10-day period. During this period, if the average daily revenue was $360 for the first 6 days, what was the average daily revenue for the last 4 days?

2 Explanations

1

Joseph Lucaj

Heres mine:

360(6)+4(x))/10=400

360(6)+4x=4000

4((90(6)+x))=4000

540+x=1000

1000-540=460

Jun 22, 2015 • Comment

Jonathan , Magoosh Tutor

Correct!

Jun 29, 2015 • Reply

1

Gravatar Mike McGarry, Magoosh Tutor

Dec 28, 2013 • Comment

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