Hi All,

This prompt is more about organization and basic arithmetic than anything else. You do NOT need the calculator as long as you take good notes, make some reasonable estimates and do some multiplication.

From the information in the prompt, we can make a little table of data (based around three 5-year 'blocks' of time):

'90-'95: 2500 books published; X books sold

'95-'00: >2500 published; 1.52X books sold

Total books sold '90-'00 = 3843 = 2.52X

From here, you should quickly note that X MUST be > 1,000. A reasonable estimate would be X = 1500 (try multiplying 2.5 by 1500 and you'll see).

'00-'05: 2(1.52X) books sold = 3.04X books sold

The question asks for TOTAL BOOKS SOLD from '90 - '95 and from '00-'05

Using X = 1500 as an estimate....

'90-'95 = X = 1500 books sold

'00-'05 = 3.04X = about 4500 books sold

From the given values in the table, the only answers that are close are:

GMAT assassins aren't born, they're made,

Rich

_________________

Official Guide 2016 Question Breakdown:

http://gmatclub.com/forum/empowergmat-blog-198415.html#p1527977

Rich Cohen

Rich.C@empowergmat.com

http://www.empowergmat.com

GMAT Club Verified Reviews for EMPOWERgmat & Special Discount

EMPOWERgmat Podcast - A Wild Secret About The GMAT Algorithm