GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

 It is currently 23 Jan 2020, 07:13

### 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

# WINK, Inc. follows a certain procedure that requires two tas

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 10 Jul 2013
Posts: 280
WINK, Inc. follows a certain procedure that requires two tas  [#permalink]

### Show Tags

21 Aug 2013, 18:50
00:00

Difficulty:

5% (low)

Question Stats:

96% (00:58) correct 4% (02:46) wrong based on 71 sessions

### HideShow timer Statistics

WINK, Inc. follows a certain procedure that requires two tasks to be finished independently in order for a job to be done. On any given day, there is a 7/8 probability that task 1 will be completed on time, and a 3/5 probability that task 2 will be completed on time. On a certain day, what is the probability that task 1 will be completed on time, but task 2 will not?

A. 1/20
B. 3/40
C. 13/40
D. 7/20
E. 13/22
Intern
Joined: 21 Aug 2013
Posts: 6
Re: WINK, Inc. follows a certain procedure that requires two tas  [#permalink]

### Show Tags

21 Aug 2013, 19:03
Asifpirlo wrote:
WINK, Inc. follows a certain procedure that requires two tasks to be finished independently in order for a job to be done. On any given day, there is a 7/8 probability that task 1 will be completed on time, and a 3/5 probability that task 2 will be completed on time. On a certain day, what is the probability that task 1 will be completed on time, but task 2 will not?
A. 1/20
B. 3/40
C. 13/40
D. 7/20
E. 13/22

7/20...
Explanation: 7/8 * 2/5
where 2/5 is the probability of task 2 not getting completed on time...
Math Expert
Joined: 02 Sep 2009
Posts: 60627
Re: WINK, Inc. follows a certain procedure that requires two tas  [#permalink]

### Show Tags

22 Aug 2013, 03:57
Asifpirlo wrote:
WINK, Inc. follows a certain procedure that requires two tasks to be finished independently in order for a job to be done. On any given day, there is a 7/8 probability that task 1 will be completed on time, and a 3/5 probability that task 2 will be completed on time. On a certain day, what is the probability that task 1 will be completed on time, but task 2 will not?

A. 1/20
B. 3/40
C. 13/40
D. 7/20
E. 13/22

P(1 and not 2)=7/8*(1-3/5)=14/40=7/20.

_________________
Re: WINK, Inc. follows a certain procedure that requires two tas   [#permalink] 22 Aug 2013, 03:57
Display posts from previous: Sort by