Probability with Playing Cards and Venn Diagrams

Probability of compound events. The Addition Rule. Common Core Standard 457 S-CP.7

Category:

Education

Tags:

• math
• chance
• probability

[kunairuto]

I don't know why I watch this... I know almost everything about math...

But this is still entertaining... what's wrong with me???

[randomisawesomeAJ]

the fat guy from the hangover 1 watched this

[ThePuzzleMom]

@NlessJurnE Sal is emphasizing that he is using inclusive "or" rather than an exclusive "or". Notice he explains how you count that middle section both if you just add the jacks and the hearts.

[Saronaist]

The 81st like is me!!

[NlessJurnE]

@NlessJurnE

if you already knew this then sorry, i don't understand what you are trying to say.

it's b/c you said P (J and/or H) and the video is only calculating P(J or H)

[NlessJurnE]

@ikmoestLucaslezen

don't know if you care anymore but P(J or H) means that you are adding the probability of getting a heart or a jack.

Thing is that the probability of a heart includes the jack of hearts meaning if you add 13 H + 4 J together, you are adding the jack of hearts twice.

However we want to have only one jack of hearts once (b/c a deck of 52 only has one) so we subtract only 1 not 2 b/c we still want ONE jack of heart to fulfill the conditions of P (J or H).

does that made sense?

[ikmoestLucaslezen]

In your last calculation, 'probability jacks or hearts' I think there should be added something more :

either you include jack of hearts to that : [P (J and/or hearts)]

or you do not include the jack of hearts : [P (J or hearts)], meaning that it can not be both jack and hearts

in the last case there should be substracted 2 in stead of 1 in the ending sum :

P (J or hearts) = (13+4-2) / 52

if i would be making a mistake saying this please notify me on that :-)

thanks for educating me! :-)

[chorus1900]

Guys, this video is for every one; especially those who are scared of maths. Such people have to be taught every bit of maths to make them comfortable with maths. We have to appreciate Salman Khan for his effort to provide free education in all possible subjects to the entire world. He has received several awards for his cause to educate every person on this earth, and also received funds from Google, Microsoft, and some other.

[chorus1900]

Thank you! You are doing a great job. If i get rich, I'll contribute funds to your cause.

[darkfighte]

I love u sal

[TwistedLemniscate]

@kunairuto "I know almost everything about math"

I'm calling bullshit