BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

find such questions mind boggling!

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Master | Next Rank: 500 Posts
Posts: 122
Joined: Tue Jul 10, 2012 9:12 am
Thanked: 2 times
Followed by:8 members

find such questions mind boggling!

by mehaksal » Mon Aug 27, 2012 6:39 am
A and B alternately toss a coin. The first one to turn up a head wins. if no more than five tosses each are allowed for a single game.
1- Find the probability that the person who tosses first will win the game?
2- What are the odds against A's losing if she goes first?
Top
Source: — Problem Solving |
User avatar
Master | Next Rank: 500 Posts
Posts: 122
Joined: Tue Jul 10, 2012 9:12 am
Thanked: 2 times
Followed by:8 members

by mehaksal » Mon Aug 27, 2012 6:41 am
particularly confusing i find the odds in favour and odds against cases...please help...
Top
User avatar
Legendary Member
Posts: 502
Joined: Tue Jun 03, 2008 11:36 pm
Thanked: 99 times
Followed by:21 members

by vk_vinayak » Mon Aug 27, 2012 6:49 am
mehaksal wrote:A and B alternately toss a coin. The first one to turn up a head wins. if no more than five tosses each are allowed for a single game.
1- Find the probability that the person who tosses first will win the game?
2- What are the odds against A's losing if she goes first?
Do you have the answers? I calculated the first one and got 341/512 as answer.

P(the person who tosses first will win the game) = 1/2 + 1/(2^3) + 1/(2^5) + + 1/(2^7) + + 1/(2^9)

Let me know if it is correct.
- VK

I will (Learn. Recognize. Apply)
Top
Post new topic Post Reply
• Page 1 of 1