Probability & Statistics (17 of 62) The 'At Least One or Once' Rule

In this video I will explain the “at least one or once rule”.

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[munishyadav]

Why do you want to promote formula based learning? I like your videos. But I think best way to teach would be by emphasizing more on logic.

[xYovth.Z]

1:04 soo no head?..., on the serious note this guy is helping me pass my final haha

[BL-bpds]

You are the best probability lec. Thank you😇

[EP-rqpn]

Thank you for this, I think this is a pretty intuitive way and I can see how it makes sense. Is there another formula for this that is instead based on the outcome you are trying to achieve rather than 1- what you are not looking for? I thought that multiplying the desired outcome by the number of tries but that didn't work even thought it made sense in my brain....

[charabotte]

so it's impossible to find the formula that works without the opposite trick

[akshitbhalla]

I feel the formula is wrong.
P(At least one head) = 1 - P(No Heads)
Here, P(No Heads) = Outcomes with No Heads / Total outcomes.
Outcomes with No Heads = 1 (Only TTTT....)
Total outcomes = 2^n (Each single even has 2 outcomes and n events)
So, P(No Heads) = 1/2^n
Therefore, P(At least one head) = 1-1/2^n

[heraldotello]

I followed your videos when i was taking electric circuits and let me tell you the professor I took was insane difficult(my fault for thinking I was hot stuff and could take on anyone lol) I did pass now I'm taking prob. and statistics and when I saw your videos I was like THANK GOD because I would have been SCREWED!!!! lol

[MrWinter]

Thank you so much! I really like this equation because it builds upon the earlier rules of calculating coin flips!

[RajendraKumar]

Unnecessary use of formula. Focus on the logic behind rather, otherwise things are good.

[markjones]

I don't feel like figuring this out. Please describe the logic/intuition behind the formula. Thank you.