My Math Forum Basic Stats Problem!
 User Name Remember Me? Password

 Probability and Statistics Basic Probability and Statistics Math Forum

 March 12th, 2016, 03:48 PM #1 Newbie   Joined: Mar 2016 From: Oregon Posts: 2 Thanks: 0 Basic Stats Problem! Hey all - Going through an intro to stats class here, and am having an issue with a homework problem that we have not covered in class yet. Here it is: “As a poor college student, I bought four $2 scratchers in hopes to win some extra cash. On the back of the scratcher, it said the odds of winning are 1 out of every 3.8. So with my quick thinking I thought I would for sure win. I scratched all of them and didn't win anything. What is the likelihood of that happening?” I know the reason why he didn't win, but I am looking for some help with the probability numbers itself of him not winning after scratching 4 of them (at a 1 in 3.8 chance) I am sure the answer is trivial and simple, but I am stuck. Really appreciate the help! Last edited by snewman2; March 12th, 2016 at 03:51 PM.  March 12th, 2016, 05:31 PM #2 Math Team Joined: Nov 2014 From: Australia Posts: 689 Thanks: 244 The probability of him winning on one of the scratchies is$\dfrac{1}{3.8} = \dfrac{5}{19}$. Thus, the probability of him losing on one of the scratchies is$1 - \dfrac{5}{19} = \dfrac{14}{19}$. Since he lost on all four scratchies, the required probability is$\left(\dfrac{14}{19}\right)^4$. Thanks from snewman2 March 12th, 2016, 05:47 PM #3 Newbie Joined: Mar 2016 From: Oregon Posts: 2 Thanks: 0 Quote:  Originally Posted by Azzajazz The probability of him winning on one of the scratchies is$\dfrac{1}{3.8} = \dfrac{5}{19}$. Thus, the probability of him losing on one of the scratchies is$1 - \dfrac{5}{19} = \dfrac{14}{19}$. Since he lost on all four scratchies, the required probability is$\left(\dfrac{14}{19}\right)^4\$.
You are a god sir. Thanks for the quick reply. I completely understand that concept now, and it will really help me going forward.

Appreciate it!

 Tags basic, probability, problem, stats

 Thread Tools Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post DocNougat Algebra 1 September 9th, 2012 03:40 PM tsl182forever8 Algebra 3 February 12th, 2012 07:45 PM jbenloulou Algebra 0 June 17th, 2009 11:46 PM jd254 Algebra 6 April 10th, 2009 12:45 AM yeonbi Advanced Statistics 1 September 24th, 2007 06:27 PM

 Contact - Home - Forums - Cryptocurrency Forum - Top