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The GMAT Math Pro logo is stuck on the highest ledge of a nine-story

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The GMAT Math Pro logo is stuck on the highest ledge of a nine-story  [#permalink]

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New post 27 Nov 2019, 02:14
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The GMAT Math Pro logo is stuck on the highest ledge of a nine-story building and must climb down to the single ledge on the bottom row to get to safety. Each move he makes must be to a ledge on the level immediately below him and to the immediate right or left of the ledge on which he’s currently standing. If all available ledges are pictured in the above diagram, how many paths can he take to get to safety?

A. 18
B. 70
C. 128
D. 256
E. 512


Are You Up For the Challenge: 700 Level Questions


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Re: The GMAT Math Pro logo is stuck on the highest ledge of a nine-story  [#permalink]

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New post 27 Nov 2019, 05:18
Total number of ways
= 8C4=70





Bunuel wrote:
Image
The GMAT Math Pro logo is stuck on the highest ledge of a nine-story building and must climb down to the single ledge on the bottom row to get to safety. Each move he makes must be to a ledge on the level immediately below him and to the immediate right or left of the ledge on which he’s currently standing. If all available ledges are pictured in the above diagram, how many paths can he take to get to safety?

A. 18
B. 70
C. 128
D. 256
E. 512


Are You Up For the Challenge: 700 Level Questions


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The attachment GMATLogoLedges.jpg is no longer available

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GMAT Club Bot
Re: The GMAT Math Pro logo is stuck on the highest ledge of a nine-story   [#permalink] 27 Nov 2019, 05:18
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The GMAT Math Pro logo is stuck on the highest ledge of a nine-story

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