Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 30 Jun 2016, 05:55

### GMAT Club Daily Prep

#### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# In a nationwide poll, N people were interviewed. If 1/4 of

Author Message
Senior Manager
Joined: 23 May 2005
Posts: 266
Location: Sing/ HK
Followers: 1

Kudos [?]: 40 [0], given: 0

In a nationwide poll, N people were interviewed. If 1/4 of [#permalink]

### Show Tags

29 Oct 2006, 00:18
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

In a nationwide poll, N people were interviewed. If 1/4 of them answered "yes" to question 1, and of those, 1/3 answered "yes" to question 2, whih of the following expressions represents the number of people interviewed who did NOT answer "yes" to both questions?

a. N/7
b. 6N/7
c. 5N/12
d. 7N/12
e. 11N/12
_________________

Impossible is nothing

Intern
Joined: 28 Aug 2006
Posts: 8
Followers: 0

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

### Show Tags

29 Oct 2006, 04:37
I'd go with (E) 11N/12

Hence those who did not answer yes to both questions would be 1 - N/12 = 11N/12
SVP
Joined: 24 Aug 2006
Posts: 2132
Followers: 3

Kudos [?]: 124 [0], given: 0

### Show Tags

29 Oct 2006, 07:27
zippo wrote:
I'd go with (E) 11N/12

Hence those who did not answer yes to both questions would be 1 - N/12 = 11N/12

Yes yes.

Or you can pick numbers, a safe one would be 120, as it is a common multiple.
Intern
Joined: 02 Oct 2006
Posts: 30
Location: Singapore
Followers: 0

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

### Show Tags

29 Oct 2006, 08:16
Hermione wrote:
In a nationwide poll, N people were interviewed. If 1/4 of them answered "yes" to question 1, and of those, 1/3 answered "yes" to question 2, whih of the following expressions represents the number of people interviewed who did NOT answer "yes" to both questions?

a. N/7
b. 6N/7
c. 5N/12
d. 7N/12
e. 11N/12

N respondents would have fallen under one of 4 possible categories:

Q1 - Y, Q2 - N
Q1 - Y, Q2 - Y - > information provided
Q1 - N, Q2 - N
Q1 - N, Q2 - Y

With the information provided, we can formulate the Q1 and Q2 - Y repondents = (1/3) x (1/x4) x N. = (1/12)xN ......Since Q1- Yes Respondents = (1/4)xN.

The questions is asking for the number that DID NOT answer yes to both questions, which refer to the other 3 combination possilbillities as shown above.

Therfore the answer = N - (no. of those of answered yes to both)
= N - (1/12)N
= (11/12)N.
Re: PS: Proportions   [#permalink] 29 Oct 2006, 08:16
Display posts from previous: Sort by