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GMAT Prep Prob

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Re: GMAT Prep Prob

by logitech » Tue Nov 18, 2008 9:29 am
moneyman wrote:Is the ANS C ?
= 26^4 + 26^5

= 26^4 x (1+26)

= 27x 26^4
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by rtfact » Tue Nov 18, 2008 9:30 am
yes, the answer is C.

four letters code: 26^4
five letters code: 26^5

26^4+26^5=26^4*(1+26)=26^4*27
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Re: GMAT Prep Prob

by logitech » Tue Nov 18, 2008 9:31 am
logitech wrote:
moneyman wrote:Is the ANS C ?
First of all!

54 minutes remaining when you are at 24th question! WOWW!! :twisted:

= 26^4 + 26^5

= 26^4 x (1+26)

= 27x 26^4
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by mals24 » Tue Nov 18, 2008 9:31 am
Yup answer should be C

Total number of 4 letter codes = 26*26*26*26 = 26^4
Total number of 5 letter codes = 26*26*26*26*26 = 26^5

Maximum number of different stocks = 26^5+26^4

26^4(26+1) = 26^4*27
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by moneyman » Tue Nov 18, 2008 9:32 am
Relax dude..its from another source..not my test screen
Maxx
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by mals24 » Tue Nov 18, 2008 9:36 am
Ohh no wonder i was thinking how come you don't know the OA.
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by logitech » Tue Nov 18, 2008 9:59 am
mals24 wrote:Ohh no wonder i was thinking how come you don't know the OA.
In this argument, author assumes that people know the OA, if they are at 24th question when there is 54 minutes left :lol:
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i still dont understand it

by saabidi » Tue Nov 18, 2008 7:17 pm
Hi Guys can you explain how are you getting 27 from 26^5
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Re: i still dont understand it

by logitech » Tue Nov 18, 2008 7:28 pm
saabidi wrote:Hi Guys can you explain how are you getting 27 from 26^5
= 26^4 + 26^5

= 26^4 + 26 x 26^4 , lets call 26^4 as @

= @ + 26 @

= 27 @

= 27 26^4

Is it clear my friend ?
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