Added: 3 years ago
From: khanacademy
Views: 85,115
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  • seriously, the probability of me understanding PROBABILITY is 0.5 :-(

  • the probability of having exactly one pass in three throw is 9.6% and this makes you to make the game equal and the probability of failing the three shot in a row is 0.8% there for the probability of winning the game will be 100-9.6-0.8=89.6%

  • you never answered the original question: what is the probability of winning the game?

    is it making two shots out of three, therefore .8x.8= 64%?

  • your first freethrow example is wrong sir if you want to determine the probablility of tying you can only score one basket, not at least one. the probability of getting at least one insinuates that you may have scored 2 or 3, therefore winning. If im not mistaken this would be solved the same as the coin example with 5 tosses where you wanted to find the probability of getting only one head. you are no longer a credible resource lol

  • I DONT GET SHIT ABOUT PROBABILITY DAMN IT!!!!!!

  • Thanks for the Project Idea. We have to do one in Statistics and it is driving me up a wall. Oh, and thanks for helping me with my midterm today...

  • He should prepare a little better before he makes these videos.. all of the back and forth makes it more confusing. Other than that all of these videos are great.

  • Im pausing my next game!

  • i dont understand this part...

  • All of Your videos are easy to understand and have taught me a lot- THANK YOU FOR ALL THE TIME AND HELP!!!!!! God bless you.

  • Actually, such a thing can't really be proven with science. Even though, mathematically, the outcome of one throw has no influence on the next, it has a huge effect on psychology. It boils down to the fact that no matter how experienced you are, there is always a great deal of pressure, especially if that throw is decisive. Some people get less nervous when scoring and some get even more nervous. It depends completely on who you are.

  • @DeathG4n It actually on more thing. In away game fans make waves to dizzle player's eyes. Sound, air circulation, wetness of hand and ball, color of ring and etc . Man this is just a math video without any other conditions

  • LOL 0:43 -> behid

  • *Player goes to make the game winning shot in a tied game - PAUSE.

    "Just a second guys, I want to work out the probability that this shot will go in!".

  • what does he do for a living ?

  • exactly one basket should be the probability of Tie?

    More then one basket is the probability of winning?

    less then one is the probability of losing ?

  • lost, sorry!!!!!!!!!!!!

  • You realize that you need to plan this kinda things? For ppl who didn't understand check Arts of problem solving.

  • OMG this is so confusing, could you please Sal write a little bit more organized because i didn't understand a single thing of what you wrote on the basketball part

  • the probability of someone disliking this video is 9.09%

  • @pblennerhassett

    9.7 now :D

  • confusing :S but good work. I hope it gets better.

  • confusing :S

  • I'm using you science experiment idea. Thanks.

  • still dun understand...y do have to digress? occassionally

  • This guy is my hero!!!

  • did i miss something, or did we skip over the initial "winning" scenario. the occasional slips in these videoa add to their charm--there is a lot spontaneous energy-- i could never something like this unscripted--its a real talent!

  • @yynotx u r right! lol but we forgive him! XD

  • I'm studying for my GMAT and this is a great refresher. It is actually easier to follow you then my Stats Prof. Dr. Hobson (Acadia University) , although to be better than him would not be hard. Thanks khanacademy

  • .008 =.08 %, not 8%

  • .008 is .8%

  • you're both wrong. .008 = 0.8%

  • Sal, I think you made a mistake (or else you changed the problem mid-stream without telling us). The problem was probability of a Tie, which does not equal P(at least one). You gave us the prob of not losing. Much later you do say prob "of at least tieing", but that was after you had given the solution. Solution to the prob proposed , a tie, is P(exactly one).

    P.S. I don't know how to spell tieing either.

  • i picked that up aswell..

  • Sent me back 3 videos after watching this (Doing the first part of binomials did me in, learned the difference between specific probabilities and probabilities with multiple outcomes). :-P

    Instead of P(tieing), he could have said P(Tieing U Winning), P(Tieing) + P(Winning), or P(X=>1 basket)...

    Overall, it really added to my learning.

  • ty again m8, been a fan since 11th grade =)

  • You are amazing man, I got an exam in a few days and I am probably gonna score at least a solid B thanks to your tutorials.

  • Just AMAZING!! i have my Alevel exam tommorow and im just siiting and watching it today, regrting why I didnt go through this before?...

    Anyways thanks alot!

  • The coefficients found when expanding binomial brackets are given by this combination formula which is also useful when working with binomial probability distributions....you'll meet those things later if you continue to study statistics. It's very interesting because it is more obviously applicable than lots of the other mathematics which seems too abstract and theoretical when you first start to learn it. Happy learning folks. It's great to learn stuff.

  • The probability of winning the lottery is given by a combination formula which is quite interesting. In the UK the original lottery consisted of picking 6 numbers from a total of 49. Entering the following into a calculator gives the number of different combinations of 6 numbers possible from a choice of 49.

    49 nCr 6.

  • It's nearly 14 million to one against. If you spent £6.9 million your winning chance would be around 1/2 but someone else might pick the same numbers too forcing a shared pot!

  • You can do that because they're mutually exclusive events, not because they're independent. Two independent events can happen at the same time, where as two mutually exclusive cannot. this is way you can some the event probabilities without regarding the joint probability.

  • Like always, great videos! But the above comments are correct, P of a TIE is hitting EXACTLY 1 out of 3 FTs. Not the P of 1-(P of missing all 3).

  • P(a tie) is actualy .096 because to tie he needs to make exactly 1 basket of three not 1 or more. .992=P(1 or more) would be the probablity of a win or a tie right?

  • Yeah, im from Europe so my basket ball knowledge is not great. but if each freethrow is worth a point and your are a point behind - then p(tie) is the prob of getting exactly 1 free throw.

  • I haven't checked the point where the problem was originally posed, but at 5:22 he says, "So i have a 99.2 % chance of AT LEAST tying the game".

  • Comment removed

  • @jurassiclizzard At the end he says at least tie

  • i find things that i dont understand super interesting ;)

  • This type of math is very interesting.

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