It is currently 21 Mar 2018, 19:14

### 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

# On Saturday morning, Malachi will begin a camping vacation

Author Message
Manager
Joined: 18 Nov 2008
Posts: 114
On Saturday morning, Malachi will begin a camping vacation [#permalink]

### Show Tags

23 Nov 2008, 05:24
On Saturday morning, Malachi will begin a camping vacation and he will return home at
the end of the first day on which it rains. If on the first three days of the vacation the
probability of rain on each day is 0.2, what is the probability that Malachi will return
home at the end of the day on the following Monday?
A. 0.008
B. 0.128
C. 0.488
D. 0.512
E. 0.640

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Manager
Joined: 28 Jul 2004
Posts: 135
Location: Melbourne
Schools: Yale SOM, Tuck, Ross, IESE, HEC, Johnson, Booth

### Show Tags

23 Nov 2008, 06:30
Probability that it does not rain on Sat = 1-0.2 = 0.8
Prob that it does not rain on Sun = 1-02 = 0.8
Prob that it rains on Mon = 0.2

SO, prob that she returns on Monday = 0.8 x 0.8 x 0.2 = .128

_________________

kris

Manager
Joined: 18 Nov 2008
Posts: 114

### Show Tags

23 Nov 2008, 09:53
thanks krishan, I mistook on the following monday for on the day following monday we should we always cautios of the words in gmat

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: probability   [#permalink] 23 Nov 2008, 09:53
Display posts from previous: Sort by

# On Saturday morning, Malachi will begin a camping vacation

Moderator: chetan2u

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.