Making predictions with probability | Statistics and probability | 7th grade | Khan Academy

Predict the number of times a spinner will land on an elephant.

Missed the previous lesson?

Grade 7th on Khan Academy: 7th grade takes much of what you learned in 6th grade to an entirely new level. In particular, you'll now learn to do everything with negative numbers (we're talking everything--adding, subtracting, multiplying, dividing, fractions, decimals... everything!). You'll also take your algebraic skills to new heights by tackling two-step equations. 7th grade is also when you start thinking about probability (which is super important for realizing that casinos and lotteries are really just ways of taking money away from people who don't know probability) and dig deeper into the world of data and statistics. Onward! (Content was selected for this grade level based on a typical curriculum in the United States.)

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[mayiloveyousm]

when you have distance learning, this is our hero in times of need

[DoJ]

All I have to say is thank you for being my quarantine hero

[adamo]

Thank you for these videos it’s really helpful during this quarantine

[Veezy]

I have online classes and my teacher has been making us watch a bunch of videos and then doing IXL

[tabskies]

You've been better than all my teachers in my entire life

[FloraAFlower]

I just dont understand why you learn this in 7th grade. I learned multiplying fractions by whole numbers in 4th grade, that is all you need for these predictions. So why not 4th or 5th grade.

[TraceguyRune]

The probability of getting an Elephant all 210 times is P(A) = (4/7)^210 or P(A) = 1 - P(B)... P(B) = (3/7)^210.

I think the universe has a better chance of exploding tomorrow. P(210 Elephants) < P(Universe explodes)

[planktonfun]

1-(1-(4/7)^210) probability of getting at least one elephant

[stephanyhernandez]

I had a DCP yesterday and I passed with an 87😀😁😃😄😆

[xx_yolojkkk]

I WANNA CRY WHY IS THIS NOT HELPING MEEEE

[ramilroxas]

Question, how did u multiply the fractions?

[finnderella]

My teacher is literally assigning this video to us idk how she’ll know if we watched it she don’t test us

[Spoif]

Khan Academy What is the probability of NOT getting an elephant at all in 210 consecutive spins ?

[bladeiron]

Why he sound depressed in this video and this video only?

[JCResDoc]

Always only to infinity. Every spin has a 4/7 chance is not a real world anything. We teach them fkn close ended BS.