How to Solve Probability Word Problems | P(A and B) | P(A or B)

How to Solve Probability Word Problems | P(A and B) | P(A or B) | Binomial Probability

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Күн бұрын

www.greenemath.com/
/ mathematicsbyjgreene
In this lesson, we will learn how to solve some basic probability word problems.

Пікірлер: 79

@Greenemath 3 жыл бұрын

Check out our free website: GreeneMath.com

@Greenemath 3 жыл бұрын

@@macalandongryan5293 Hi, what does this question have to do with probability word problems? Please check out our video on solving linear systems in two variables. kzfaq.info/get/bejne/qqxxi8KQ2JqalIE.html I think that video will help you out :)

@Greenemath 3 жыл бұрын

@@macalandongryan5293 Hi, please see other comment. We are not a homework service. You need to set up a system of linear equations.

@macalandongryan5293 3 жыл бұрын

@@Greenemath that is not homework service :) Its just an example on google

@macalandongryan5293 3 жыл бұрын

@@Greenemath no hate just love:)

@macalandongryan5293 3 жыл бұрын

and I think its not working in substitution

@conradmbugua9098 Жыл бұрын

Probability is the bane of my existence

@Greenemath Жыл бұрын

It's not that bad, just work some practice and it will get easier.

@Mochi_177 Ай бұрын

Math has literally never been a struggle to me but probability pisses me off

@ShaesWays 2 жыл бұрын

Thank you so much for this video! I understand the basic probabilities, but as soon are we get to these word problems I was so confused. I am so glad I found this video to help me understand where I was going wrong.

@Greenemath 2 жыл бұрын

Glad it was helpful! Good luck with your studies :)

@abdullahshakeel4745 2 жыл бұрын

you helped alot in clearing my concep, i am solving similar problems for my assignment

@Greenemath 2 жыл бұрын

Glad I could help!

@_aamir4694 2 жыл бұрын

Sir can I ask u something would teach me on any other platform plz

@Greenemath 2 жыл бұрын

GreeneMath is free of charge

@LauraMBracco 2 жыл бұрын

In the last problem, how did you get 5 over 3 = 10??? I heard you say, "5 common 3 is 10." What does that mean?? Thanks, great job teaching all of the other problems.

@Greenemath 2 жыл бұрын

What's the time marker? I'll take a look and explain what's going on.

@virgolife4266 Жыл бұрын

I'm very late, but I'll just post this for others who are asking the same question. 5C3 or 5 choose 3 refers to how many combinations are possible from 5 items, taken 3 at a time. Find 5C3 from Al, Betty, Charlie, Delilah, Erin. The number of possible ways you could take 3 people from that list (Al, Betty, Charlie, Delilah, Erin) are: Al / Betty / Charlie, Al / Betty / Delilah, Al / Betty / Erin, Al / Charlie / Delilah, Al / Charlie / Erin, Al / Delilah / Erin, Betty / Charlie / Delilah, Betty / Charlie / Erin, Betty / Delilah / Erin, Charlie / Delilah / Erin. So 5 choose 3 = 10 possible combinations.

@annedahan7009 Жыл бұрын

@@virgolife4266 thank youuuuu 🥹

@kenyakelly1822 4 ай бұрын

yea that confused me too i did it my way and got the same answer

@scftiqzz 2 ай бұрын

may I know what’s your method?

@makecoolness692 Жыл бұрын

i have to do shsat summer school and my math teacher talks way to fast and i barely get any answers down. this helped

@Greenemath Жыл бұрын

Try making an audio recording, that way when you read your notes you can listen. I used that strategy in graduate school and it helped a lot. Good luck with your sat test.

@taraardestani3337 Жыл бұрын

In the second question, can’t u just divide 11 by 3 to get 33? Or am I wrong?

@Greenemath Жыл бұрын

What's the time marker?

@peacebestill662 3 жыл бұрын

Wow.... I actually get it! 😀

@Greenemath 3 жыл бұрын

I'm glad to hear that! 😎

@AtotheZ322 3 жыл бұрын

Perhaps I didn't understand the last problem correctly. If I use binomial coefficients: (1/4)^3 * (3/4)^2. I get 8.78x10^-3, which is slightly off from the answer. I'm not sure what I'm doing wrong.

@Greenemath 3 жыл бұрын

Hi Andrea, Did you figure this out on your own or do you still need help with the problem? Let me know.

@bitzaroco7720 Жыл бұрын

@@Greenemath😊

@syedmuhammadmehdi7137 Жыл бұрын

@Greenemath hey I'm still confused about the Last problem

@portiaasaglo6061 2 жыл бұрын

Mr greene I was completely confused and I didn’t get you solved. Thanks

@Greenemath 2 жыл бұрын

You are welcome.

@portiaasaglo6061 2 жыл бұрын

Please I don’t get you

@laeltam2640 Жыл бұрын

Helpful

@Greenemath Жыл бұрын

Glad to hear that!

@user-yz5ck9gy3r 2 жыл бұрын

thank you

@Greenemath 2 жыл бұрын

You're welcome

@noahpetty234 Жыл бұрын

Thank you

@Greenemath Жыл бұрын

You're welcome

@mrmc55 6 күн бұрын

Thank you 😊❤❤

@Greenemath 6 күн бұрын

You're welcome

@Mappleleaf1377 2 жыл бұрын

Ty! This helped a lot

@Greenemath 2 жыл бұрын

Glad to hear that!

@isabellamarie2492 3 жыл бұрын

Thank you so much!

@Greenemath 3 жыл бұрын

You're welcome!

@Idk_97110 Ай бұрын

How the is the first question 1/4 it should be half beacause 2,4,6 are even numbers in so 3 numbers from 6. So it should be 3/6 or 1/2

@Greenemath Ай бұрын

What's the time maker of your question?

@chrislett5093 Жыл бұрын

I hate statistics so much. DImes and Nickles U.S & Canada: P(AorB)=p(A)+p(B) - p(A and B) to me that formula means you always get zero. How can you add A&B and then subtract A&B and get anything but zero? Don't tell me that's not what it means because that's how it is written. It should be Minus - P(A). or -P(B). My brain just can't take it. :( Looks like I'm dropping this course until next year.

@Greenemath Жыл бұрын

Just slow down and write the problem down. Then just use the formula step by step and you'll be fine.

@ianyu8411 Жыл бұрын

That's because + and * are different. Simplify things by just everything is 0.25. 0.25 + 0.25 = 0.5. 0.25 * 0.25 = 0.0625. Even if we're talking about probability. 1 + 2 (A + B) = 3, 1 * 2 (A * B) is 2, they are not the same.

@kenyakelly1822 4 ай бұрын

i hate it too I cant wait until this class is over

@vividchilling2492 10 ай бұрын

11:37 why did you add 6/13?

@vividchilling2492 10 ай бұрын

11:20

@Greenemath 10 ай бұрын

Do you mean subtract 6/13? Just follow the formula listed on the screen. You need to subtract away P(A and B).

@vividchilling2492 10 ай бұрын

@@Greenemath it kind of over laps right? you put 6/13 because you only want to include the specific two outcomes only right? also thanks for these videos !

@vividchilling2492 10 ай бұрын

@@Greenemath I had looked at another video, so am kind of just piecing everything together a bit

@Greenemath 10 ай бұрын

@vividchilling2492 All of these problems have a very specific formula to use. Whether you are using this video tutorial or another, use the formula provided and follow it step-by-step to get the correct answer.

@annebelleez 17 күн бұрын

wait for the first or question why do you need to subtract

@Greenemath 17 күн бұрын

What's the time marker of your question?

@kingofnothing7 Ай бұрын

8:11

@Greenemath Ай бұрын

😎

@jaineilsart1528 Жыл бұрын

Whats the chance that someone will watch this video after seeing the thumbnail? :-).. I mean probability...

@Greenemath Жыл бұрын

It's all based on search for math videos. I guess a thumbnail has some impact, but not like with normal KZfaq videos that people watch for entertainment.

@vividchilling2492 10 ай бұрын

13:13, 8/13 ? how?? why not 26!?

@Greenemath 10 ай бұрын

How are you getting 26! What are your steps?

@vividchilling2492 10 ай бұрын

Oh! @Greenemath I had wrote it different... I wrote out the 7+7 steps down and it confused me

@Greenemath 10 ай бұрын

@vividchilling2492 Just follow the steps given in the tutorial and you'll get the correct answer.

@kenyakelly1822 4 ай бұрын

i think you dont add denominators only multiply

@nguyenphunggiahungschannel4413 Жыл бұрын

Thank you so much for this video! I understand the basic probabilities but as soon are we get to these word problems I was so confused. I am so glad I found this video to help me understand where I was going wrong.

@Greenemath Жыл бұрын

You are so welcome!

@napsu5750 Жыл бұрын

Why would you write the same previous comment again

@ansleyroberts6155 Жыл бұрын

@@napsu5750 they just copied some other person LMAO