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:

At a two-day seminar, 90 percent of those registered attende [#permalink]

Show Tags

17 Dec 2005, 22:41

1

This post received KUDOS

14

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

35% (medium)

Question Stats:

68% (02:04) correct
32% (01:06) wrong based on 500 sessions

HideShow timer Statistics

At a two-day seminar, 90 percent of those registered attended the seminar on the first day. What percent of those registered did not attend the seminar on either day?

(1) A total of 1,000 people registered for the two-day seminar.

(2) Of those registered, 80 percent attended the seminar on the second day.

Re: At a two-day seminar, 90 percent of those registered attende [#permalink]

Show Tags

18 Dec 2005, 10:30

2

This post was BOOKMARKED

At a two day seminar, 90% of those registered attended the seminar on the first day. What percent of those registered did not attend the seminar on either day?

(1) A total of 1,000 people registered for the two-day seminar
(2) Of those registered, 80% attended the seminar on the 2nd day

Main Stem: 90% attended on First Day

Statement I:
1000 Registered....We dont know how many attended on Second Day And how many attended on both the days......Insufficient

Statement II:
80% on II day; We dont know how many attended on both the days to find the NONE.......Insufficient

Even after combining Statements I & II, we dont get the percentage attended on both the days to calculate the percentage who didnt attend at all....

Re: At a two-day seminar, 90 percent of those registered attende [#permalink]

Show Tags

19 Dec 2005, 11:06

Kishore wrote:

At a two day seminar, 90% of those registered attended the seminar on the first day. What percent of those registered did not attend the seminar on either day?

(1) A total of 1,000 people registered for the two-day seminar (2) Of those registered, 80% attended the seminar on the 2nd day

Main Stem: 90% attended on First Day

Statement I: 1000 Registered....We dont know how many attended on Second Day And how many attended on both the days......Insufficient

Statement II: 80% on II day; We dont know how many attended on both the days to find the NONE.......Insufficient

Even after combining Statements I & II, we dont get the percentage attended on both the days to calculate the percentage who didnt attend at all....

Hence Answer is E

Wouldn't the answer be C, if we knew that every participant registered had to attend the seminar on both the days?

Re: At a two-day seminar, 90 percent of those registered attende [#permalink]

Show Tags

20 Dec 2005, 02:36

TeHCM wrote:

At a two day seminar, 90% of those registered attended the seminar on the first day. What percent of those registered did not attend the seminar on either day?

(1) A total of 1,000 people registered for the two-day seminar (2) Of those registered, 80% attended the seminar on the 2nd day

Stmt1 : Nothing is known about the second day. so insuff.
Stmt2: Number of people registered is unknown so insuff.
Combined: % of people who attended on both days is not given. So insuff.

Re: At a two-day seminar, 90 percent of those registered attende [#permalink]

Show Tags

13 Apr 2006, 15:30

The answer is E. We do not have enough information to solve this problem, because we don't know what percentage the overlap of attendance was between the two days. For example, all 80% that attended the second day also attended the first day. This would result in 10 % of people who didn't attend either day. however, if only 7/8 of the 80% that attended the second day also attended the first day, then you'd have 0% that attended either day. Since we could have multiple values that fulfill this, we cannot answer the question.

Re: At a two-day seminar, 90 percent of those registered attende [#permalink]

Show Tags

12 Jul 2007, 12:03

I am getting E on this one.

1) INSUFFICIENT: This tells us that 900 people attended the seminar on the first day. 100 people did not atttend. But we know nothing about day 2.

2) INSUFFICIENT: We don't have any numbers to calculate how many people actually went to the seminar on both days.

Together: We know that 100 people did not attend on day 1 and that 200 people did not attend on day 2. But these could be unique people, so that 0% did not attend the seminars on either day. It could also be that the 100 people who did not attend on day 1 did not attend on day 2. So together insufficient.

A venn diagram would only be useful if we knew something about the overlap, ie how many people who went to the seminar on day 1 that also went on day 2. Since we have nothing on that, I am thinking E.

Re: At a two-day seminar, 90 percent of those registered attende [#permalink]

Show Tags

12 Jul 2007, 12:22

leeye84 wrote:

At a two-day seminar, 90% of those registered attended the seminar on the first day. What percent of those registered did not attend the seminar on either day?

1) A total of 1000 people registered for the two-day seminar. 2) Of those registered, 80% attended the seminar on the second day.

I'm lost on this one. I think Venn Diagram should be used here, but I have no idea how to apply it. Please help. Thanks!

E. We do not know who registered on the first day and who did for the second day. there could be possibility that those registered for the first day did also register for the second day as well. it is also possible that those did not register for the first day also did not register for the second day.

i donot know how to draw a ven diagram on the computer. but if you can, it would clearly help.

Got the question below, and I am not sure if my approach is correct. Question is attached.

Here is my solution: 1) Insufficient 2) Insufficient Together: --> to solve this together we need to know whether the 90% includes both days or just one. Likewise for 80%. It looks like both of them would include both days but we cannot assume. I guess because of that both of these are insuffiecient? Not sure what the real reason is. Hoping that someone can help me out.

Got the question below, and I am not sure if my approach is correct. Question is attached.

Here is my solution: 1) Insufficient 2) Insufficient Together: --> to solve this together we need to know whether the 90% includes both days or just one. Likewise for 80%. It looks like both of them would include both days but we cannot assume. I guess because of that both of these are insuffiecient? Not sure what the real reason is. Hoping that someone can help me out.

Thanks,

Yela

Merging similar topics. Please refer to the discussion above and ask if anything remains unclear.

Re: At a two-day seminar, 90 percent of those registered attende [#permalink]

Show Tags

12 Jul 2015, 12:30

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

Re: At a two-day seminar, 90 percent of those registered attende [#permalink]

Show Tags

31 Jul 2016, 15:08

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

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...