GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 20 May 2019, 15:45

### 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

# If a/b<c/d & bd < 0, which of the following inequalities must be true?

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 25 Dec 2018
Posts: 299
Location: India
Concentration: General Management, Finance
GMAT Date: 02-18-2019
GPA: 3.4
WE: Engineering (Consulting)
If a/b<c/d & bd < 0, which of the following inequalities must be true?  [#permalink]

### Show Tags

25 Apr 2019, 10:13
00:00

Difficulty:

75% (hard)

Question Stats:

44% (02:14) correct 56% (02:10) wrong based on 34 sessions

### HideShow timer Statistics

If a/b<c/d & bd < 0, which of the following inequalities must be true?

A. I only
B. II only
C. III only
D. I and II
E. II and III
Math Expert
Joined: 02 Aug 2009
Posts: 7681
Re: If a/b<c/d & bd < 0, which of the following inequalities must be true?  [#permalink]

### Show Tags

25 Apr 2019, 22:42
1
1
mangamma wrote:
If a/b<c/d & bd < 0, which of the following inequalities must be true?

A. I only
B. II only
C. III only
D. I and II
E. II and III

$$\frac{a}{b}<\frac{c}{d}$$
Since bd < 0,, we can multiply the inequality by bd and change the inequality sign..
$$bd*\frac{a}{b}>bd*\frac{c}{d}......ad>bc...ad-bc>0$$

Option III is exactly the same, so correct..

let us see the other options..

C
_________________
Re: If a/b<c/d & bd < 0, which of the following inequalities must be true?   [#permalink] 25 Apr 2019, 22:42
Display posts from previous: Sort by