Conditional Probability - Example 1

Course Web Page: sites.google.com/view/slcmath...
For question (a), "she" refers to the "person", which is a feminin noun in French. If you find this confusing, then simply replace "she" by "the person".

[@geoffreywoodland1672]

nice explanation, but the gender mixup is utterly confusing.

[@slcmathpc]

Geoffrey Woodland Substituting "she" by "the person" should clear up any confusion.

[@geoffreywoodland1672]

Thanks!

[@puppylove422]

LOL. i love it when they work out the problems by hand. they do not skip a lot of steps. they show their work

[@dmacbta]

Your video helped me finish my last two problems! I was stuck on them for 35 minutes until I looked up a video and found this. Within 5 minutes I had both of them completed and they were right!! Thank you so much for your help!

[@lovelysayson6721]

This rlly helped me a lot! I clearly understand this better than the examples given in my modules. Thanks : )

[@reinielreyes8917]

Excellent! Thank you, Sir. You are better than my math teacher.

[@umrs]

brilliant explanation, finally got my head around this chapter

[@eternalcrux8261]

This has helped so much in categorizing them easily for the formula. Thx for the video.

[@JimmyDean1992]

I cant tell you how long i have struggled with understanding this. I have had numerous meetings with my professor. told her i am struggling. she explained ideas but never mentioned there was a formula. the study material is so hard to navigate that i cant find what i need to learn. i applied the formula you used and now i know what is going on! all this time wasted on struggling and you cleared it up in 8 minutes. thank you!

[@slcmathpc]

When you think of a probability as the ratio of the "size" of an event versus the "size" of the sample space, everything becomes much simpler. :-)

[@puppylove422]

WAIT I GOT IT NOW! except for the sex mix ups, this is spot on easy and explained very well. good show mate.

[@za_limitless]

Please try to listen, he said "The person" instead of She, He knows about the mistake Please try to listen to him instead of reading

[@lechomage]

Thanks a lot. It is so helpful. Now it makes way more sense to me

[@lesserafimseason]

God I swear this helped me understand the concept better thanks so much.

[@jaradrichardsC137]

Thank you so much it took so long to find the right explanation of it that used tables

[@akua3177]

Omg you freakin saved meeee. I’m taking a test tmr and sis is stress and pressed👏🏾💕thank youuuuuu

[@mathildahinape4215]

Soooooo HELPFUL 👍👍🔥🥳 THANK YOU.... Finally understood how to solve union and intersection problem 😃

[@ireenmkandawire5844]

Thank you for this lesson. I am grateful

[@kushpatel3794]

a MALE, given that SHE is right handed, L. THINK AGAIN KIDS. He says the person, he knew the mistake was there, but I think you should have fixed it. Anyway this helped LOoL. TY good man, ty.

[@Rahul-ll1hc]

Nice explanation thank you sir.

[@domayeee3648]

i am revising for a entry exam u helped a lot

[@Ahmaad1410]

شكرا لك اخي الحبيب

[@niaressiaburnett987]

This video was very helpful.

[@jackroman5076]

Thank you so much! better explanation than my teacher

[@puresoul5560]

hahahaaha /

[@rigatonischnapp898]

Nice and simple!

[@anelegumede4841]

It was very helpful Thank you

[@anqwanwer477]

Amazing. This is really helpful for me.thanks a lot

[@slcmathpc]

:-)

[@wrenchesinthegears]

Dont assume his gender

[@MayeeshaNowshin02_bpharm]

That little "oops" 😂😊 Anyways ,thank you it was a really helpful explanation.

[@mungomamuteta7570]

great work........@PC

[@eljayirish474]

Thks

[@abrarbaig8895]

Thank you so much!

[@shahg2472]

Thanks sir now I understand it🙂

[@vinwens1263]

Thanks indeed. It's so clear and understandable.

[@angeliqueramirez183]

Thank you!

[@jimmytinker6247]

LOL when He saw it he took like a small pause and realized WTF. And just went with it. LoL

[@slcmathpc]

When life gives you lemon... :-)

[@emmanuelalogo2354]

Awesome!

[@evelynmateo826]

Thank you.

[@MohamedOsama-vj5jp]

thank you ..sir

[@Khbeauty10]

THANK YOU

[@mas4322]

My rational thinking against my imagination. This make me really confuse

[@sitianikhandayani7214]

Tank You.

[@kipngenopozee]

What if conditional probability of a pdf?

[@adeshpandey953]

Thanks sir

[@glennology97]

Me reading: A male given that "she" is right handed. Me: 😧 BTW this helped. Thank's and more power to your channel. 😊

[@slcmathpc]

The "she" refers to "the person", which is a feminine noun in French. (French is my first language.) If you find it confusing, replace "she" in this case by "the person". Cheers!

[@muhammadsamiulhaq3883]

Hahahah I was also perplexed but then got it..😂

[@dhexacol9881]

Hello sir. Can i ask a question?? Are you a math teacher sir??

[@slcmathpc]

+dhex acol You can always ask.

[@logkiyakahengy3848]

Awesome

[@Amatullah_shopping_123]

Thanks

[@behnambehnani2522]

Great

[@sunnyshen4208]

This helped so much goddam

[@kimfacundolkim2033]

I am so confused. Shouldn't it be "given that he is right-handed," instead?

[@slcmathpc]

For question (a), "she" refers to the "person", which is a feminin noun in French. If you find this confusing, then simply replace "she" by "the person".

[@rutujakokate5549]

what is "she is male" ? i dont understand this statement grammatically

[@slcmathpc]

Read the description under the video. ;-)

[@Gandiya_fad_deb]

@@slcmathpc woaahh bro is replying to comments even after fkin 10 years??

[@hassaanahmedkhan5854]

Thanks she

[@avocadoo4387]

Woooow "A male given that she is right-handed" thank you math you never fail to confuse the fuck out of me

[@slcmathpc]

The "she" refers to "the person", which is a feminine noun in French. (French is my first language.) If you find it confusing, replace "she" in this case by "the person". Cheers!

[@avocadoo4387]

@@slcmathpc I love you man but they shouldn't add that lgbt+ bullshit in my math questions it will confuse idiots like me

[@lightbikevids1422]

Great awesome explanation

[@whizkid958]

guys the gender issue isn't his problem he simply got the printout, so technically its the person who wrote the printouts problem

[@slcmathpc]

Replacing "she" by "the person" should clear things up. :-)

[@sujonkumarshil8446]

Can you please tell me the probability of MALE and Female.

[@chrisallen9509]

The set of all males and the set of all females are disjoint, or they have no common elements. Thus the probability of being male and female is the intersection of two disjoint sets, or the empty set, which is 0. This assumes someone doesn't identify as both genders...

[@hulusiserdaryldrm8854]

i was like WTF ?!? when i saw she is a male then i realized that he said we should correct it with "person" lol

[@hulusiserdaryldrm8854]

but after a 10 years , thanks a lot ! you made me understand this topic which other 5 videos failed to do :D

[@ekaterinaliskin8719]

"she is a male " ? in b)

[@muhammadjaffarrazadar967]

male is he, and female is she. Thanks!

[@cassiewang273]

She is a Female not Male............

[@levelxrolex3998]

Sir 0.41÷0.86=0.476

[@ThuyNguyen-bu9ge]

P(M n R) = P(M) * P(R | M) = 0.49 * 0.41 A tree diagram would justify this. I think your calculation that P(M n R) = 0.41 is incorrect.

[@tomrose4560]

+Tiffastic Nguyen Hi In reply to your comment, the number you have for P(R | M) is incorrect. This figure should be (0.41/0.49), as it represents the probability that the person chosen is right handed, given that they are male. Explaining it another way, if we pretended that the survey was of 100 people, and so multiplying the numbers in the table by 100 gives actual numbers of people instead of percentages - Then P(R | M) represents "what is the probability that a randomly selected person is right handed, given that they are male". There are 49 males, and 41 of them are right handed, so P(R | M) = 41/49. Going back to what the video states - that P(M n R) = 0.41 - this information comes from the table. P(M n R) means the probability that a person is male and right handed. Using my sample size of 100 scenario again, there are 41 people in this category, out of a total 100. I think the confusion has come from the similar notations used in probability, namely - P(R | M) vs P(R n M), where: P(R | M) = prob. of R (GIVEN) M, and P(R n M) = prob. of R (AND) M. At the risk of repeating myself, with conditional probabilities, like P(R | M), the sample size changes. It changes to be the sample size of the condition being applied, in this case M (Male). With probability of intersecting events, like P(M n R), the sample size is the entire population. As a final comment, with your statement regarding a tree diagram, I think that your calculated number "0.49*0.41" represents the intersection of (M) with (M n R), or rewriting your whole statement correctly, it would read: P(M n (M n R)) = P(M) * P(M n R) = 0.49 * 0.41 As a Venn diagram, this would be represented by a larger circle (M) fully containing a smaller circle (M n R), where (M n R) = 0.41, and M = 0.49, with 0.08 outside the smaller circle, which is of course the males who are left handed.

[@Gipkykerpich]

I agree

[@miyuki6541]

​@@tomrose4560i agree

[@Amatullah_shopping_123]

💜💚💙💙💜💚

[@YonatanHaile-rf2jm]

this video was gonna make me question the things i know about this topic, I don't recommend this video

[@danielcrone9553]

lol, I thought (a) and (b) would be 0 because of the weird gender pronouns

[@slcmathpc]

Simply read the comment in the description; it should clear any confusion.

[@youknow383]

Honestly. All problems with genders assume gender pronouns. Where's our male she's and female he's? lol.

[@amnasa5556]

Thank you!