BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Salad dressing \(A\) is made up of 30% vinegar and 70% oil, and salad dressing \(B\) contains 10% vinegar and 90% oil.

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 2276
Joined: Sat Oct 14, 2017 6:10 am
Followed by:3 members

Salad dressing \(A\) is made up of 30% vinegar and 70% oil, and salad dressing \(B\) contains 10% vinegar and 90% oil.

by VJesus12 » Wed May 20, 2020 6:11 am

Timer

00:00

Your Answer

A

B

C

D

E

Global Stats

Salad dressing \(A\) is made up of 30% vinegar and 70% oil, and salad dressing \(B\) contains 10% vinegar and 90% oil. If the 2 dressing are combined to produce a salad dressing that is 15% vinegar, dressing \(A\) comprises what % of the new dressing?

A. 15%
B. 20%
C. 25%
D. 40%
E. 55%

[spoiler]OA=C[/spoiler]

Source: Princeton Review
Top
Source: — Problem Solving |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 8086
Joined: Sat Apr 25, 2015 10:56 am
Location: Los Angeles, CA
Thanked: 43 times
Followed by:29 members

Re: Salad dressing \(A\) is made up of 30% vinegar and 70% oil, and salad dressing \(B\) contains 10% vinegar and 90% oi

by Scott@TargetTestPrep » Mon Jun 01, 2020 7:14 am
VJesus12 wrote: ↑
Wed May 20, 2020 6:11 am
 Salad dressing \(A\) is made up of 30% vinegar and 70% oil, and salad dressing \(B\) contains 10% vinegar and 90% oil. If the 2 dressing are combined to produce a salad dressing that is 15% vinegar, dressing \(A\) comprises what % of the new dressing?

A. 15%
B. 20%
C. 25%
D. 40%
E. 55%

[spoiler]OA=C[/spoiler]

Solution:

We can let the amount of dressing A = a and the amount of dressing B = b, thus:

0.3a + 0.1b = 0.15(a + b)

30a + 10b = 15a + 15b

15a = 5b

3a = b

The total amount of the new salad dressing is a + b. Thus, dressing A is a/(a + b) = a/(a + 3a) = 1/4 = 25% of the new dressing.

Answer: C

Scott Woodbury-Stewart
Founder and CEO
[email protected]

Image

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

ImageImage
Top
Post new topic Post Reply
• Page 1 of 1