BB MATH QUESTION- help!

Test Preparation
1

<p>This is a pretty simple question-- pg467 quest 13 in the blue book
*I keep on doing 26,250-21,000 divided by 2 instead of 3.... because in my mind it's increase in profit from yr 1 to yr 2 so I only need to divide it by 2.... Can someone explain this logic to me as to why I need to divide it by 3?
I know because it says "for these 3 stores from year 1 to year 2" that you need to divide it by 3 and it made a little more sense but only because I knew the answer....</p>

<p>I guess I'm still confused as to why I need to worry about the stores when you just look at total and it's 21,000 and 26,250 and then difference is 5250 then you just divide it by 2 becuase you want avg increase from the two years....</p>

<p>Please help!!! Many thanks in advance!
[Also for grammarians-- please continue to help w/ prev. grammar post that I posted yesterday]</p>

2

<p>Can you type in the actual question? Not all of us have access to wherever this came from.</p>

3

<p>[oops didn’t realize… Collegeboard 2nd edition, pg 467 q 13.]
There’s this chart which basically is summarized by:
Store A–> Year 1: $5,000; Year 2: 6,200
Store B–> Year 1: 6,000; Year 2: 7,350
Store C–> Year 1: 10,000; Year 2: 12,700
Total for 3 stores in year 1: $21,000 and total for 3 stores in year 2: $26,250</p>

<p>The table lists the profits of 3 stores in 2 consecutive years. What was the average increase in profit for these 3 stores form year 1 to year 2?</p>

4

<p>The difference in time periods isn’t two years, it’s just 1 year. They want the average over the three stores. Store A increased 1200, Store B increased 1350, Store C increased 2700. The average increase is (1200+1350+2700)/3</p>