It is currently 18 Mar 2018, 23:46

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# PS - Statistics [Good one]

Author Message
Manager
Joined: 24 Sep 2008
Posts: 185
Schools: MIT / INSEAD / IIM - ABC
PS - Statistics [Good one] [#permalink]

### Show Tags

06 Nov 2008, 08:16
00:00

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.

PS - statistics
Attachments

File comment: PS - statistics

PS_Statistics.JPG [ 96.52 KiB | Viewed 1076 times ]

Senior Manager
Joined: 04 Aug 2008
Posts: 370
Re: PS - Statistics [Good one] [#permalink]

### Show Tags

06 Nov 2008, 12:19
OA?

_________________

The one who flies is worthy. The one who is worthy flies. The one who doesn't fly isn't worthy

Intern
Joined: 30 Oct 2008
Posts: 30
Re: PS - Statistics [Good one] [#permalink]

### Show Tags

06 Nov 2008, 13:03
% of incorrect paper record p(P) = 100*3/60
% of incorrect electric record p(E) = 100*3/75
% of incorrect paper & electric p(P ^ E) = 3

p( P U E) = 5 + 4 - 3
% correct record = 100 - p(P U E) = 94%
Manager
Joined: 24 Sep 2008
Posts: 185
Schools: MIT / INSEAD / IIM - ABC
Re: PS - Statistics [Good one] [#permalink]

### Show Tags

06 Nov 2008, 20:02
spiridon wrote:
OA?

Let's wait for couple of more reverts be patient...
VP
Joined: 05 Jul 2008
Posts: 1378
Re: PS - Statistics [Good one] [#permalink]

### Show Tags

06 Nov 2008, 20:17
Got 94

Total = 100

Incorrect CP = X; Incorrect CE & CP = 60/100 (X)

Incorrect CE = Y; Incorrect CE & CP = 75/100 (Y)

Incorrect CE & CP = 3

X = 5 and Y =4

Correct CP = 95, Incorrect CE and CP =1 . Correct CE & CP = 94
SVP
Joined: 17 Jun 2008
Posts: 1507
Re: PS - Statistics [Good one] [#permalink]

### Show Tags

07 Nov 2008, 04:52
Yep, 94% with the similar approach.
Re: PS - Statistics [Good one]   [#permalink] 07 Nov 2008, 04:52
Display posts from previous: Sort by