Finding probability example 2 | Probability and Statistics | Khan Academy

In this example we are figuring out the probability of randomly picking a non-blue marble from a bag. Again, we'll have to think about the possible outcomes first.

Missed the previous lesson?

Probability and statistics on Khan Academy: We dare you to go through a day in which you never consider or use probability. Did you check the weather forecast? Busted! Did you decide to go through the drive through lane vs walk in? Busted again! We are constantly creating hypotheses, making predictions, testing, and analyzing. Our lives are full of probabilities! Statistics is related to probability because much of the data we use when determining probable outcomes comes from our understanding of statistics. In these tutorials, we will cover a range of topics, some which include: independent events, dependent probability, combinatorics, hypothesis testing, descriptive statistics, random variables, probability distributions, regression, and inferential statistics. So buckle up and hop on for a wild ride. We bet you're going to be challenged AND love it!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to KhanAcademy’s Probability and Statistics channel:

[natarineaureliarestiawanpu]

THANK YOU! You explained clearly and better than my teacher did : )

[Smartbad]

elucidating. And on top of that, he ends up drawing the death star by the time he's done with the area problem.

[PXANDUX]

The way he is teaching is mind-blowing 🤯, it suddenly captured in my mind 😘

[marlaperesse]

Thank you, I was stuck on this! Until I saw this. This was explained much better then my teacher.

[many]

THANK YOU SO MUCH! EXCELENT EXPLANATIONS :)

[christianjohnston]

Wow, that was SO easy. I thought that the circumference problem would be way too hard to understand, but it was actually the exact opposite! Thanks:)

[rubayatahmedkhan]

Shouldn't the answer of the last problem be area of the small circle / area of the larger one ?

[rachitbhanage]

pursuing Masters in Computer Networking. Unfortunately, the questions they would be asking would be far more complex in networking mathematics but, its good for clearing a few basics ..isnt it ? :)

[learntube]

Q3) Why did you choose area for finding probability of point ?

[AliceDourountaki]

this is so thoroughly explained i am really thankful!

[JalebJay]

Will you be showing more contest like problems with the season ending this year? I know the teacher for my team has been keeping us with counting skills, and this seems right up the alley.

[fernand.g]

the first question is from UW's Fermat Math Contest of 2011 lol

[sakshambatra]

Thank You, thank you for helping me our with the last question!!

[umarus]

@awesomeconomics smaller's area is already 16pi. So =small area/big area=16pi/324pi

[asheyakannan]

Sir please show problem set of probabilty

[sinnanraza]

you explained this better than my maths
teacher

[pankajsanwal]

Nice but you can use only colour
without the tension to change colour
Please consider🤔🤔🤔

[SamDoesMath]

"lets draw that bag, thats my bag" 😂😂

[bcuerio]

we have deck of 36 cards (4 suits, 9 cards in each suit). In how many ways you can choose 3 cards with one number and two cards with other

[merdanchee]

thank u so much, ur videos are really helpful, god bless u