# Probability Explained | Independent And Dependent Events | Probability And Statistics | Khan Academy

We give you an introduction to probability through the example of flipping a quarter and rolling a die.

Practice this lesson yourself on KhanAcademy.org right now:

Watch the next 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!

Subscribe to KhanAcademyâ€™s Probability and Statistics channel:

Probability Explained | Independent And Dependent Events | Probability And Statistics | Khan Academy

## 36 Replies to “Probability Explained | Independent And Dependent Events | Probability And Statistics | Khan Academy”

1. Jeannie S Lee says:

I understand the concept of “or” but at the same time I have a difficulty understanding P(1 or 6) like are we finding the probability of the chance of the single independents that will happen at once? If they were asking individually of p(1) or p(6) it would have been 1/6 or 1/6 but since they are asking one probability question of P(1 or 6) of a single event, you would add it?

2. Sandeep Amilineni says:

we should use probability when there are equally likely possible outcomes. so we should measure before hand if the system is equally likely and not biased before applying probability

3. Klaus 74 says:

Here is something I cannot understand and haven’t been able to find an answer for. If I want to find the Ace of Spades from a 52 card deck I have a 2/52 chance if I took out two cards without looking at them. When I look at the first card I have a 1/52 chance that it is right, and if it is wrong the next card has a 1/51 chance. This is a slightly greater probability than 2/52. So why is it not the same?

This video really helped me in dealing with mathematics, especially, probability.

5. Slyc00perX says:

what is the probability that someones comment you read on this video, that person who commented is now dead? and the comment will sit here for ever

6. Seemant Samal says:

which app u are using for writing these things
plz say

7. Izmontero says:

what about “what is the probability that you role a 3, 4, and 6 if you roll the dice 10 times?” I don’t understand how you could do this?

8. Bipasha S says:

9. ranjith kumar says:

i have quiries regarding analytics can u help me out and solve the questions please provide mail adress so that i can drrop a mail

10. Ayingaran Mano says:

This is fun

11. Billan Sidow says:

My sister said “this man isn’t speaking English!!”

12. zone sicat says:

I get this but there’s a lot of different questions which thisethod can’t be use

13. Kalid Mohamed says:

Actually theres a 51 % percent chance that the coin would land out as heads. If spun head has a bigger chance of showing up!!! XD

14. Tom Walters says:

I have a question that I’d appreciate if someone could help me with. Me and my friend laid a deck of 52 cards face down…I picked a card and said it out loud..2 of clubs. We then tried to turn that card face up last…and we achieved this. What are the odds of this?

kya bol raha hai tu

16. BeautifulCryer says:

Makes so much sense. Lol

17. Jhon John Jon Jon Doe says:

what if i were playing poker and wanted to push 2 people off of a hand with a bluff would i multiply the percents that each would fold or would add the percents? Does anyone have the answer?

18. sarah c says:

I am 18 and in school nobody taught me any physics or science, and my math was awful. I love the internet.

19. Kreatos says:

Thanks for 0 point in exam +1

20. Zeal & zest says:

Hey!!!! Yeah im talking to you! Go back don’t mess around hereðŸ™…

21. Sevinj Babayeva says:

Great!

22. GhostRider says:

Nice cube

23. Dally Tato says:

i literally learn something

24. THE TATA_TAINMENT says:

Which app do you use for the blackboard i love it

I have Q and need help to understand it? is there an emil I can send my Q to it Thanks

26. Genam Potom says:

thank you

27. William Henry says:

Me and my friend was wondering if it possible and how you would calculate the possibly of encounter a person/persons. Such as what would the likely hood you run into a taxi in NYC. Not what we are wondering but it easy example.

Who’s watching in 2017

29. Syed Moheel Raza says:

What is the probability of my coin to collide with the blade of fan if I were to toss it towards the fan in ideal conditions (No Gravity, no air resistance and the coin is not flipping) of I am given with the velocity of coin,the area of fan blades and area of vulnerability of coin to collide (the total area of the path on which the fan rotates), speed of fan’s rotation,and the width of blade and coin?? ðŸ˜‰

30. Dranreb says:

Apparently the probablity of getting heads is a sexual innuendo, couldn’t understand what is wrong with it.

But the flipping must ALWAYS BE THE SAME….ie the same speed of flip, the same position of fingers etc etc etc

32. Rahaf Faraj says:

guyyyys!!!! what’s wrong with you , he just want to explain probability !!!! not probability of getting head ! stupid students ðŸ™‚

33. Tanveer Ali says:

A coin is tossed 3 times , what is probability of of getting a head and a tail alternatively ? what does alternatively mean here?

34. Jack Ward says:

Probability is much deeper, this video is useless and for children.