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by jfranco23 » Mon Mar 16, 2009 4:41 pm
During a 10-week summer vacation, ws the average (arithmetic mean) number of books that Cris read per week greater than the average number of books that John read per week?

1. Twice the average number of books that Cris read per week was greater than 5 less than twice the average number of books that John read per week
2. During the last 5 weeks of the vacation, Cris read a total of 3 books more than John
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Source: — Data Sufficiency |
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by cramya » Mon Mar 16, 2009 5:03 pm
ABC->Avg books Chris
ABJ->Avg books John
TBC> Total books Chris
TBJ->Total books John

Q: Is ABC > ABJ


Stmt II

No info about the 1st 5 weeks

INSUFF

Stmt I

2 ABC > 2 ABJ - 5

ABC > ABJ - 2.5

No idea if ABC > ABJ or if ABC IS ONLY GREATER THAN ABJ-2.5

INSUFF


Together

still insuff since we can pick number to prove either average is greater.

E
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