It is currently 19 Oct 2017, 09:27

### 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

# If a certain coin is flipped, the probability that the coin

Author Message
Manager
Joined: 08 Apr 2004
Posts: 131

Kudos [?]: 943 [0], given: 0

Location: Corea
If a certain coin is flipped, the probability that the coin [#permalink]

### Show Tags

26 Aug 2004, 22:13
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.

If a certain coin is flipped, the probability that the coin will land heads is 1/2. If the coin is flipped 5 times, what is the probability that it will land heads up on the first 3 flips and not on the last 2 flips?

A. 3/5
B. 1/2
C. 1/5
D. 1/8
E. 1/32

Kudos [?]: 943 [0], given: 0

GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5034

Kudos [?]: 437 [0], given: 0

Location: Singapore

### Show Tags

26 Aug 2004, 22:50
Number of combinations:2^5 = 32
Only 1 combination gives you HHHTT, so probaility is 1/32

You can also solve it this way: HHHTT = 1/2 * 1/2 * 1/2 * 1/2 * 1/2
= 1/32

Kudos [?]: 437 [0], given: 0

26 Aug 2004, 22:50
Display posts from previous: Sort by