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 business bought r typewriters at $100 per typewriter and s [#permalink]

Show Tags

17 Oct 2006, 08:33

00:00

A

B

C

D

E

Difficulty:

55% (hard)

Question Stats:

46% (01:52) correct
54% (00:56) wrong based on 177 sessions

HideShow timer Statistics

A business bought r typewriters at $100 per typewriter and s calculators at $50 per calculator. What is the total cost of the typewriters and calculators?

A business bought r typewriters at $100 per typewriter and s calculators at $50 per calculator. What is the total cost of the typewriters and calculators?

A business bought r typewriters at $100 per typewriter and s calculators at $50 per calculator. What is the total cost of the typewriters and calculators?

I . The s calculators cost $200 II. 2r+s = 10

TOTAL COST

100R+50S = 50(2R+S)

FROM ONE ....INSUFF

FROM TWO

EACH 2 TYPEWRITERS AND 1 CALCULATOR = 10

THUS 100R+50S = 500

b IS MY ANSWER

For the equation 100R + 50S, we will get the total cost.

The second equation is 2R + S = 10 Why are we assuming that this 10 is the cost and multiplying by 50 on both sides will get us the total cost? It could be the of the typewriters and calculators which makes choice B insufficient and C sufficient.

A business bought r typewriters at $100 per typewriter and s calculators at $50 per calculator. What is the total cost of the typewriters and calculators?

(1) The s calculators cost $200

(2) 2r + s = 10

TOTAL COST

100R+50S = 50(2R+S)

FROM ONE ....INSUFF

FROM TWO

EACH 2 TYPEWRITERS AND 1 CALCULATOR = 10

THUS 100R+50S = 500

b IS MY ANSWER

For the equation 100R + 50S, we will get the total cost.

The second equation is 2R + S = 10 Why are we assuming that this 10 is the cost and multiplying by 50 on both sides will get us the total cost? It could be the of the typewriters and calculators which makes choice B insufficient and C sufficient.

We need to find the value of 100r + 50s.

(2) says that 2r + s = 10 multiply by 50: 50*(2r + s) = 100r + 50s = 500. So, we have the value we wanted. Thus this statement is sufficient.
_________________

A business bought r typewriters at $100 per typewriter and s calculators at $50 per calculator. What is the total cost of the typewriters and calculators?

(1) The s calculators cost $200

(2) 2r + s = 10

TOTAL COST

100R+50S = 50(2R+S)

FROM ONE ....INSUFF

FROM TWO

EACH 2 TYPEWRITERS AND 1 CALCULATOR = 10

THUS 100R+50S = 500

b IS MY ANSWER

For the equation 100R + 50S, we will get the total cost.

The second equation is 2R + S = 10 Why are we assuming that this 10 is the cost and multiplying by 50 on both sides will get us the total cost? It could be the of the typewriters and calculators which makes choice B insufficient and C sufficient.

We need to find the value of 100r + 50s.

(2) says that 2r + s = 10 multiply by 50: 50*(2r + s) = 100r + 50s = 500. So, we have the value we wanted. Thus this statement is sufficient.

Why are we multiplying the equation 2r + s by 50 ? Can we multiply it by 100 and get the same correct answer?

Re: A business bought r typewriters at $100 per typewriter and s [#permalink]

Show Tags

19 Nov 2013, 01:02

Hello,

From the question what we need is

100r+50s=? which actually translates to 50(2r+s) = ?

Now,

Option 1:

cost of s calculator = 200 so we know each calculator is 50 hence all we know from option 1 is that we have 4 calculators But no idea about typewriter Yet

So option 1 alone is not enough

Option 2:

2r+ s = 10

which means that this can be directly substituted into the equation we derived from the question.

For the equation 100R + 50S, we will get the total cost.

The second equation is 2R + S = 10 Why are we assuming that this 10 is the cost and multiplying by 50 on both sides will get us the total cost? It could be the of the typewriters and calculators which makes choice B insufficient and C sufficient.

We need to find the value of 100r + 50s.

(2) says that 2r + s = 10 multiply by 50: 50*(2r + s) = 100r + 50s = 500. So, we have the value we wanted. Thus this statement is sufficient.

Why are we multiplying the equation 2r + s by 50 ? Can we multiply it by 100 and get the same correct answer?

We need to find the value of 100r + 50s. Do you get 100r + 50s when you multiply 2r + s by 100?
_________________

Re: A business bought r typewriters at $100 per typewriter and s [#permalink]

Show Tags

11 Nov 2015, 19:20

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.
_________________

A business bought r typewriters at $100 per typewriter and s calculators at $50 per calculator. What is the total cost of the typewriters and calculators?

(1) The s calculators cost $200

(2) 2r + s = 10

Given: Price of r typewriters = 100*r Price of s calculators = 50*s

Required: 100*r + 50*s =? Or 50(2r + s) = ?

Statement 1: s calculators cost $200 Or 50s = 200 This does not gives us anything about r. INSUFFICIENT

Statement 1: 2r + s = 10 This gives us the value of unknown entity in 50*(2r + s) Hence, the total cost can be found out. SUFFICIENT

Option B
_________________

Reach out to us at bondwithus@gmatify.com

gmatclubot

Re: A business bought r typewriters at $100 per typewriter and s
[#permalink]
12 Nov 2015, 04:31

After days of waiting, sharing the tension with other applicants in forums, coming up with different theories about invites patterns, and, overall, refreshing my inbox every five minutes to...

I was totally freaking out. Apparently, most of the HBS invites were already sent and I didn’t get one. However, there are still some to come out on...

There is without a doubt a stereotype for recent MBA grads – folks who are ambitious, smart, hard-working, but oftentimes lack experience or domain knowledge. Looking around and at...