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:

A thinly stretched pharmaceuticals company operates three [#permalink]

Show Tags

16 Oct 2005, 18:52

00:00

A

B

C

D

E

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.

A thinly stretched pharmaceuticals company operates three business divisions: drugs, biotech, and medical devices. Each division employs 50 people each. There is a special task force of 10 employees who belong to all three divisions. In addition, there are â€œcross specialist positionsâ€

Last edited by Titleist on 17 Oct 2005, 13:55, edited 7 times in total.

probability of picking either a drug or med dev specialist - so you must exclude cross specialists and task force members

total employees = 80

thus picking a drug employee 10/80

picking a med dev. employee 2/80

add since it's 'or' 10/80 + 2/80 =3/20

Can you please explain how did you get total number of employees to be 80?

I am coming up with :
50 + 50 + 50 - (50) + 10 or 110

Question:
what is the probability that if an employee is chosen at random from this company that he or she is an employee of either the drug division or the medical devices division but not both?

Also, as question does not explicitly removes from scope, why didnt you pick employees that are:
cross specialist with BOTH Drug & Biotech OR
cross specialist with BOTH Med dev & Biotech

probability of picking either a drug or med dev specialist - so you must exclude cross specialists and task force members

total employees = 80

thus picking a drug employee 10/80

picking a med dev. employee 2/80

add since it's 'or' 10/80 + 2/80 =3/20

Can you please explain how did you get total number of employees to be 80?

I am coming up with : 50 + 50 + 50 - (50) + 10 or 110

Question: what is the probability that if an employee is chosen at random from this company that he or she is an employee of either the drug division or the medical devices division but not both?

Also, as question does not explicitly removes from scope, why didnt you pick employees that are: cross specialist with BOTH Drug & Biotech OR cross specialist with BOTH Med dev & Biotech

Look at jainvineet's explanation - it's correct as so far as how he calculated the number of individuals.

Look at jainvineet's explanation - it's correct as so far as how he calculated the number of individuals.

I understood the indivisual numbers in jainvineet's explanation. But my question remains how did total comes out to be : 80
Also how do we interpret question so as not to include cross specilist with Bio.
Am sure I am missing some rudimentary point. Thanks.

Look at jainvineet's explanation - it's correct as so far as how he calculated the number of individuals.

I understood the indivisual numbers in jainvineet's explanation. But my question remains how did total comes out to be : 80 Also how do we interpret question so as not to include cross specilist with Bio. Am sure I am missing some rudimentary point. Thanks.

We interpret the question as simply what is the probability that the individual we pick at random is an employee of ONLY Drugs or ONLY Medical Devices - and not both - so that would mean you exclude cross specialists within drugs/med devices.

I really hope this helps!

Attachments

venndi_healthcare.JPG [ 28.7 KiB | Viewed 929 times ]

why are the employees who are both Drug and Biotech , both Medical Device and Biotech excluded ?

The question was only asking for the exclusion for those that are both in Drug and Medical Device, right ?

THe question is asking for the probability of picking someone who works for either (not both) drug OR medical devices division. Not both. That is why you must exclude the cross specialists.

Re: PS Word Problem - Overlapping Set/Probability Combo [#permalink]

Show Tags

06 Nov 2005, 20:50

[quote="Titleist"]A thinly stretched pharmaceuticals company operates three business divisions: drugs, biotech, and medical devices. Each division employs 50 people each. There is a special task force of 10 employees who belong to all three divisions. In addition, there are â€œcross specialist positionsâ€

We need to find the probablity of an employee of either the drug division or the medical devices division but not both. i.e. We only need to count
n(d) + n(M) = 12/80 = 3/20