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# Ann and Bob planted trees on Friday. What is the ratio of

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Intern
Joined: 06 Jun 2012
Posts: 27

Kudos [?]: 37 [0], given: 62

Ann and Bob planted trees on Friday. What is the ratio of [#permalink]

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06 Jul 2012, 13:08
00:00

Difficulty:

25% (medium)

Question Stats:

65% (00:30) correct 35% (00:40) wrong based on 72 sessions

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Ann and Bob planted trees on Friday. What is the ratio of the number of trees that Bob planted to the number of trees that Ann planted?

(1) Ann planted 20 trees more than Bob planted.
(2) Ann planted 10 percent more trees than Bob planted.
[Reveal] Spoiler: OA

Kudos [?]: 37 [0], given: 62

Manager
Joined: 19 Mar 2012
Posts: 171

Kudos [?]: 54 [0], given: 13

Location: United States
Concentration: Finance, General Management
GMAT 1: 750 Q50 V42
GPA: 3.69
WE: Analyst (Mutual Funds and Brokerage)
Re: Ann and Bob planted trees on Friday [#permalink]

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06 Jul 2012, 14:00
Alterego wrote:
Ann and Bob planted trees on Friday. What is the ratio of the number of trees that Bob planted to the number of trees that Ann planted?

1) Ann planted 20 trees more than Bob planted.
2) Ann planted 10 percent more trees than Bob planted.

What we want to know:
Bob/Ann = ?

(1) Ann = 20 + B, plugging it into our equation we have B/(B+20) . . . we can't determine the answer from this fraction

(2) Ann = (1 + 0.10) * Bob, rearranging this . . . Bob/Ann = 1/(1+0.10) = (1/1.1) . . . Sufficient

Kudos [?]: 54 [0], given: 13

Re: Ann and Bob planted trees on Friday   [#permalink] 06 Jul 2012, 14:00
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