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Overlap between OG10 and OG11

Expert replies
by Stacey Koprince » Mon May 14, 2007 8:48 am
Hey, guys

Someone asked a while ago what the specific overlap is between OG 10 and OG11 and I just knew the overlap was large but didn't know the actual percentage.

Well, someone in our office has actually counted (how'd you like to have that job? :)) and discovered that about 75% of the questions that were in OG10 show up in either OG11 or the math or verbal supplements. Of the nearly 1500 quesitons in the 3 "new" books, about 400 of them did not appear in OG10. The rest did.

We all knew there was a lot of overlap anyway, but now it's confirmed... not worth it to buy OG10.
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Stacey Koprince
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Manhattan GMAT

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Source: — GMAT Strategy |

by aim-wsc » Mon May 28, 2007 11:42 pm
I usually suggest one of following two combinations.

1. to have all new OG BOOKS ie. Orange, purple and green
or
2. to have OG 10 AND OG 11 edition.


the reason is new supplement books (verbal and quant guides) of OG HAVE MAJOR repeats from OG 10.

... I DONT have any of these books right now. :( so Stacey would you just confirm about it as whether my post is correct?
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by Stacey Koprince » Mon May 28, 2007 11:50 pm
The numbers I have don't split out OG11 from the two supplements - so I don't know.
Please note: I do not use the Private Messaging system! I will not see any PMs that you send to me!!

Stacey Koprince
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Director of Online Community
Manhattan GMAT

Contributor to Beat The GMAT!

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