Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

All the stocks on the over-the-counter market are designated [#permalink]

Show Tags

20 Aug 2005, 07:28

3

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

25% (medium)

Question Stats:

70% (02:01) correct
30% (02:22) wrong based on 94 sessions

HideShow timer Statistics

All the stocks on the over-the-counter market are designated by either a 4 letter or 5 letter codes that is created by using the 26 letters of the alphabet. Which of the following gives the maximum number of different stocks that can be designated with these codes?

A. 2(26^5) B. 26(26^4) C. 27(26^4) D. 26(26^5) E. 27(26^5)

All of the stocks on the over-the-counter market are designated by either a 4-letter or a 5-letter code that is created by using the 26 letters of the alphabet. Which of the following gives the maximum number of different sotcks that can be designated with these codes?

a) 2(26^5)
b) 26(26^4)
c) 27(26^4)
d) 26(26^5)
e) 27(26^5)

All of the stocks on the over-the-counter market are designated by either a 4-letter or a 5-letter code that is created by using the 26 letters of the alphabet. Which of the following gives the maximum number of different sotcks that can be designated with these codes?

a) 2(26^5) b) 26(26^4) c) 27(26^4) d) 26(26^5) e) 27(26^5)

it is unclear whether repetition is allowed or not.

if allowed c) 27(26^4) = 26^4 + 26^5 = 26^4 (1+26)

All of the stocks on the over-the-counter market are designated by either a 4-letter or a 5-letter code that is created by using the 26 letters of the alphabet. Which of the following gives the maximum number of different stocks that can be designated with these codes?

a. 2(26^5)
b. 26(26^4)
c. 27(26^4)
d. 26(26^5)
e. 27(26^5)

All of the stocks on the over-the-counter market are designated by either a 4-letter or a 5-letter code that is created by using the 26 letters of the alphabet. Which of the following gives the maximum number of different stocks that can be designated with these codes?

a. 2(26^5) b. 26(26^4) c. 27(26^4) d. 26(26^5) e. 27(26^5)

C.

Four letters have total of = 26*26*26*26 = 26^4
Five letters have total of = 26*26*26*26*26 = 26^5
Together, Total = 26^4 + 26^5 = 26^4 * (1+26) = 26^4 * 27

all the stocks on the over-the-counter market are designed by either a 4-letter or a 5-letter code that is created by using the 26 letters of the alphabet. Which of the following gives the maximum number of different stocks that can be designed with these codes? a) 2(26^5) b) 26(26^4) c) 27(26^4) d) 26(26^5) e) 27(26^5)

All stocks on over the counter medication is designtaed by either 4 or 5 letter code created by using 26 letters of the alphabet. Which of the following gives the maximum number of different stocks that can be designated using these codes.

A) 2(26 ^5) B)26(26^4) C)27(26^4) D)26(26^5) E)27(26^5)

All stocks on over the counter medication is designtaed by either 4 or 5 letter code created by using 26 letters of the alphabet. Which of the following gives the maximum number of different stocks that can be designated using these codes.

A) 2(26 ^5) B)26(26^4) C)27(26^4) D)26(26^5) E)27(26^5)

4 letter code OR 5 letter code (OR means ADD)

ie 26*26*26*26 + 26*26*26*26*26

====> 26*26*26*26(26+1)

(26^4)(27)

C ??
_________________

"You have to find it. No one else can find it for you." - Bjorn Borg

All stocks on over the counter medication is designtaed by either 4 or 5 letter code created by using 26 letters of the alphabet. Which of the following gives the maximum number of different stocks that can be designated using these codes.

A) 2(26 ^5) B)26(26^4) C)27(26^4) D)26(26^5) E)27(26^5)

4 letter code OR 5 letter code (OR means ADD)

ie 26*26*26*26 + 26*26*26*26*26

====> 26*26*26*26(26+1)

(26^4)(27)

C ??

Yup. OA is C. I got the wording wrong. i thought that some numbers were codified with 2-letter code and some by 5-letter code. Idiotic mistake.

Amit, how true the GMAT Perp scores can be? I mean in math section, I got 14 wrong ( time constrain), though in first 20 only 3 were incorrect and in verbal I got 8 incorrect ( 3 wrongs in first 20 ) yet I got 690. and my verbal score were low and math scores were high in that prep test.

All stocks on over the counter medication is designtaed by either 4 or 5 letter code created by using 26 letters of the alphabet. Which of the following gives the maximum number of different stocks that can be designated using these codes.

A) 2(26 ^5) B)26(26^4) C)27(26^4) D)26(26^5) E)27(26^5)

4 letter code OR 5 letter code (OR means ADD)

ie 26*26*26*26 + 26*26*26*26*26

====> 26*26*26*26(26+1)

(26^4)(27)

C ??

Yup. OA is C. I got the wording wrong. i thought that some numbers were codified with 2-letter code and some by 5-letter code. Idiotic mistake.

Amit, how true the GMAT Perp scores can be? I mean in math section, I got 14 wrong ( time constrain), though in first 20 only 3 were incorrect and in verbal I got 8 incorrect ( 3 wrongs in first 20 ) yet I got 690. and my verbal score were low and math scores were high in that prep test.

GMATPrep scores are the closest. It uses the same algorithm as the real one ... I guess you got the tough ones wrong and had a string of wrongs .....
_________________

"You have to find it. No one else can find it for you." - Bjorn Borg

Can you explain why the four and five letter code has 26^4 and 25^5 different permutations? I thought I would have to work out a very complicated permutations formula on this problem in order to figure it out...

Can you explain why the four and five letter code has 26^4 and 25^5 different permutations? I thought I would have to work out a very complicated permutations formula on this problem in order to figure it out...

Coming to 4 letter code, each letter can be any one of the 26 alphabets. So total number ways of choosing 4 letters will be 26 x 26 x 26 x 26 = 26^4

Similarly 5 letter code we will have = 26^5

Total = 26^5+26^4 = 26^4(26+1) = 27 (26^4)

In case if no two letters of the code are same, then the first letter of the 4 letter code can be chosen in 26 ways, the second letter of the code can be chosen in 25 ways, third letter in 24 ways and the 4 letter in 23 ways. Hence in this case the total number of 4 letter codes will be 26 x 25 x 24 x 23

Happy New Year everyone! Before I get started on this post, and well, restarted on this blog in general, I wanted to mention something. For the past several months...

It’s quickly approaching two years since I last wrote anything on this blog. A lot has happened since then. When I last posted, I had just gotten back from...

Happy 2017! Here is another update, 7 months later. With this pace I might add only one more post before the end of the GSB! However, I promised that...