probability

This topic has expert replies
Source: — Problem Solving |

Master | Next Rank: 500 Posts
Posts: 258
Joined: Thu Aug 07, 2008 5:32 am
Thanked: 16 times

Re: probability

by x2suresh » Tue Feb 24, 2009 8:43 pm
sweta_smile wrote:If i toss a coin 5 times, What is the probability that i will get heads on any of the 2 tosses?
=5C2* (1/2)^2*(1/2)^3 = 10/2^5 = 5/16

Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Sun Jan 25, 2009 1:25 am

by sweta_smile » Wed Feb 25, 2009 9:52 am
how did you get this??

Senior | Next Rank: 100 Posts
Posts: 73
Joined: Wed Jan 07, 2009 1:00 pm
Location: Tampa, FL
Thanked: 9 times
GMAT Score:630

by Mr2Bits » Wed Feb 25, 2009 10:04 am
sweta_smile wrote:how did you get this??

Combinations formula nCk = N!/K!(n-k)!

and

Binomial Theory
https://www.beatthegmat.com/probability- ... 15621.html