probability kills

• Feb 6th 2013, 06:44 AM
geniusgarvil
probability kills
John has 3 unique coins such that getting head from them is 1/100, 2/100 & 3/100 respectively. If he flips each of the 3 coins once, what is the probability of getting at least 1 head.
• Feb 6th 2013, 07:41 AM
MINOANMAN
Re: probability kills
Getting at least one head means that you will not get 3 tails.
P(3Tails) = 0.99x0.98x0.97=0.941
Therefore P( at least one H) =1-0.941=0.059
Minoas
• Feb 6th 2013, 07:47 AM
earthboy
Re: probability kills
Quote:

Originally Posted by geniusgarvil
John has 3 unique coins such that getting head from them is 1/100, 2/100 & 3/100 respectively. If he flips each of the 3 coins once, what is the probability of getting at least 1 head.

I am not sure,only trying... probability is the the most confusing part of math...do you have the answer?

probability of getting tail from first coin=1-1/100=99/100
probability of getting tail from first coin=1-2/100=98/100
probability of getting tail from first coin=1-3/100=97/100

probability of getting all tails=99/100*98/100*97/100=941094/1000000
probability of getting at least one heads=1-941094/1000000=29453/500000 which is roughly 5.890% chance...
• Mar 15th 2013, 02:40 PM
HallsofIvy
Re: probability kills
Minoanman beat you by six minutes!