Find all School-related info fast with the new School-Specific MBA Forum

It is currently 03 May 2016, 00:55
GMAT Club Tests

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

A coin that is tossed will land heads or tails, and each

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 10 Oct 2005
Posts: 113
Location: Hollywood
Followers: 0

Kudos [?]: 45 [0], given: 0

A coin that is tossed will land heads or tails, and each [#permalink]

Show Tags

New post 30 Sep 2006, 13:37
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 3 sessions

HideShow timer Statictics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

A coin that is tossed will land heads or tails, and each outcome has equal probability. What is the probability that the coin will hand heads at least once on two tosses?

A- 1/4
B- 1/3
C- 1/2
D- 2/3
E- 3/4
_________________

The GMAT, too tough to be denied.
Beat the tough questions...

Manager
Manager
User avatar
Joined: 25 May 2006
Posts: 227
Followers: 1

Kudos [?]: 38 [0], given: 0

 [#permalink]

Show Tags

New post 30 Sep 2006, 14:02
Getting A - 1/4

1st toss: P: 1/2 for heads
2nd toss: P: 1/2 for heads

So,

@ least one head in the two tosses:

(1/2)^2=1/4[/quote]
_________________

Who is John Galt?

Senior Manager
Senior Manager
User avatar
Joined: 11 Jul 2006
Posts: 382
Location: TX
Followers: 1

Kudos [?]: 9 [0], given: 0

 [#permalink]

Show Tags

New post 30 Sep 2006, 15:18
3/4

Atleast once 1 in 2 tosses

Case 1

Heads and tails 1/2*1/2
Tails and heads 1/2*1/2
Heads and Heads 1/2*1/2


Answer 1/4+1/4+1/4=3/4
VP
VP
User avatar
Joined: 25 Jun 2006
Posts: 1172
Followers: 2

Kudos [?]: 96 [0], given: 0

 [#permalink]

Show Tags

New post 02 Oct 2006, 01:13
E. 3/4.

you can finger count, or use probability formula.
Manager
Manager
avatar
Joined: 12 Sep 2006
Posts: 91
Followers: 1

Kudos [?]: 2 [0], given: 0

 [#permalink]

Show Tags

New post 02 Oct 2006, 02:40
got E as well

at least one head

so 1 - P(no head)
1-1/4=3/4
  [#permalink] 02 Oct 2006, 02:40
Display posts from previous: Sort by

A coin that is tossed will land heads or tails, and each

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.