Flipped 11.3 Binomial Probability with "at least" or "at most"

Flipped assignment 11/3 for Algebra2/Trigonometry
This lesson shows you how to find the Binomial probability with the phrase "at least" or "at most" in the question.

[@sagaringmar1412]

sitting for half an hour just staring at my textbook...and this video solved everything in five minutes. thank you!!!

[@shivalisrivastava7081]

Same

[@anne-mariegolba8602]

Most interesting to say the Least.

[@stephenhedrick7490]

Thank you for the straightforward explanation. Extremely helpful. Thanks.

[@scottweiss9618]

Thanks Professor Welton. The book the Intro Course I am taking is "Elementary Statistics A Step by Step Approach" by Allan G.Bluman and the answer key in the back of the book has started a steak of wrong answers for the "at least" problems (you know, >=, that is, inclusive of the "at least" number and above). Just incase I lost my mind, I needed a reality check. But, yeah, its a McGraw Hill Book and they have fallen on hard times. All they could find to write a Statistics book was Bluman and he teaches out a Community College "near" Pittsburgh. They couldn't even find an author from a community College in a city we have ever heard of. Well, obviously Bluman took the money and ran, and McGraw Hill didn't proof the book or publish, or have published a Student Solutions Manual (which is impossible to write if the book has a significant proportion of problems that are so mis-written that they have no solutions, which is also a problem with that book). But, yeah, Professor Welton, maybe you should write an Intro to Statistics Book. How could you do worse, right?

[@ryanbaca2902]

You're better than my professor. Thank you infinitely!!

[@kritibhuju1929]

thanks!! you really made it easy to understand the process and solve the problems

[@pingpinkjoe9145]

Wow so amazing ,am so grateful because of this video i understand better than my lecturer

[@mothralord1709]

Please don't use marker pen on paper again, it hurts the ear if using earphones but damn great vid man. Also is there a shortcut if they start asking for big numbers?

[@vanikasharma1838]

Best vedio ever

[@VSVPxJOHAN]

thank you so much!

[@alexandersummers334]

Is there an easier way to do this if you have bigger numbers. Say there are 20 trials and you're asked for the probability of at least 10 successes. Do I have to go from 0 to 10 and add all of those probabilities up?

[@WLTAL]

Thank you

[@mercyj4789]

If you changed the first question to “at most”, wouldn’t it give you the same results as the “at least”?

[@muhammadhumayun2295]

thank you bro save my time...

[@anbesateame1114]

what a teacher! incredible!

[@aofunnycilps8044]

um the at most seems a bit confusing but,i got the at least down

[@bupelungu7419]

thankyou

[@Hossam_1993]

Thaaaaaaaaank youuuuu I was killing myself about 12c4

[@kastrosadam892]

But what if the "at least" numbers are bigger? Like "At least 7 out of 20?" Is there a new formula to use then?

[@jonathanphlek5252]

fucken love you man

[@sarahbencic1050]

can you do this without that type of scientific calculator?

[@JWelton]

Absolutely, you just have to use the formula for Combinations that has the fraction and factorials. Many "lower" level calculators still have the nCr option.

[@bktheoriginal6041]

How about the "by hand" version, versus "by calculator" version?

[@karenlazo9263]

THANK YOU

[@jasminewang6815]

Can u do something similar to how when it at least 1, you do 1-p(none) ?

[@haronhenry7051]

Thanks dude

[@SaifJ123]

That was vey helpful. Thanks a lot! :)

[@nkatekongobeni9661]

Where’s the link for the 1st one

[@alexsepelenco9902]

so If i needed to find a least three things from 20 do \i have to do that 18 times?

[@Blueskywatcher]

Where's the link?

[@joemora3573]

thank you so much for this video!!!!

[@zakariabdulrazaq8612]

great

[@Marco85111]

how do you not get high from all that sharpie odor

[@eulamanning4892]

where is the answer?

[@MegaScorpio30]

0.209

[@RobBabu]

During the wet season, the probability of encountering leeches during a daily bushwalk in the Paluma National Park is 75%.
What is the probability that a group of bushwalkers on a 5 day bush walk:
(a) will encounter leeches on at least 2 days ?
(b) will experience exactly 2 leech free days ?

[@JWelton]

b is the easier one since it is "exactly" = 5P2 (0.75)^2 (0.25)^3
a. at least is 2,3,4 or 5 = 5P2 (0.75)^2 (0.25)^3 + 5P3 (0.75)^3 (0.25)^2 + 5P4 (0.75)^4 (0.25)^1 + 5P5 (0.75)^5 (0.25)^0

[@lluchtenburg]

what's the answer I don't see a link! I got .2099

[@llRHFll]

Thank you!!!! :D

[@trishakhat1703]

Lit

[@drjedo]

good video

[@ShesNotReadyToDie]

watched!

[@TeriAllton]

For that last one, you said "click the link to see if you got it right." What link????? I got .0041152263. Can someone let me know if that's correct? Or where to go see if it's correct? Thanx in advance!! Great video BTW!!!

[@TeriAllton]

Nevermind, that's not right! I got .2098765432. SOO sorry! How bout that, is that correct? Thanks again guys, sorry

[@xXKirkSoloXx]

"point 60"?
..

[@mimiwizthetahini]

he changed the probability from % to a decimal

[@MichaelasPoV]

hi weltonator lol