Test B (09 to 11) Solving Probability Word Problems Using Probability Formulas

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[@noweliablake9394]

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[@MrHelpfulNotHurtful]

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Thanks

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[@renewd]

Thanks for a good, clear, concise presentation of a subject that is sometimes unnecessariliy overcomplicated.

[@MrHelpfulNotHurtful]

Chris Manhoff You’re welcome. And thanks for the positive feedback. 😊

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You are a great teacher. You are one of the best I've seen on KZbin. It's very easy to follow everything you are doing.

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this made my life 10 times simpler and I no longer feel like crying thank u

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[@rebbekandahuma2173]

hoping to do well in my upcoming biostats exams with your wonderful tutorial. thank you!!

[@MrHelpfulNotHurtful]

You are very welcome. Good luck! 🍀

[@wendolynflorentino1605]

Excellent video -super helpful and clear and I got it (after not getting it forever in my classes) - thank you!

[@MrHelpfulNotHurtful]

Wendolyn Florentino Yay! Thanks for the feedback. 😊

[@bman9469]

Very helpful. I wish I found your videos sooner.

[@MrHelpfulNotHurtful]

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[@maryamii0414]

Thank you so much for this straight forward explanation, hope to do well in the exam today :(

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You are welcome. Good luck!🍀

[@KeyserTheRedBeard]

superb video MrHelpfulNotHurtful. I shattered the thumbs up on your video. Always keep up the solid work.

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Yay!!! I really appreciate the feedback and the support! 😄

[@okee-wink5122]

Super helpful! Very clear and understandable explanations, thank you so much!!!

[@MrHelpfulNotHurtful]

So glad I could help. I appreciate your feedback! 😊

[@bellaclark1518]

i owe my life to u…i had a morning before finals to learn this

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[@buffalogaming2934]

Great jog, this really helped me.

[@MrHelpfulNotHurtful]

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[@dcg_don]

thanks, dd for the vids

[@beanos3234]

Is there a website I could go to to access this database of probability questions you're working on through the video? It would be quite beneficial to my studies

[@MrHelpfulNotHurtful]

There’s no website or database. I am working from a OneNote notebook. Sorry.

[@saededonartgallery395]

Your equation helped me most

[@MrHelpfulNotHurtful]

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[@BlackY3ep]

i swear to god your explaination is way better than all of my prof

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[@Tyming]

u saved me on my test u legend

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[@rost187]

Great video Question for #10: Why can’t you use the “and” formula to solve? Why does the “or” condition influence the computation? Thanks!!!

[@MrHelpfulNotHurtful]

The AND. Formula is only for independent events like rolling dice or picking up cards and putting them back before picking a new card. When you are talking about percentages of people having donuts and/or coffee you cannot assume these are independent events, so use the OR formula. As a clue, if they give you the OR percentage, use the OR formula.

[@joeddonaire7800]

thank you for explaining it very well sir by the way im a student searching on how to answer probability and statistics

[@MrHelpfulNotHurtful]

You are very welcome. I’m so glad I could help. 😊

[@vividchilling2492]

This was so damn GOOOD

[@MrHelpfulNotHurtful]

Thank you!! 😊

[@extraboommain534]

Good day to you sir 😄 its 2am at the moment and im studying for a long quiz.. I must say... Thank you very because I understood the logic and mindset taught in the video! I'll be a new subscriber 😄

[@MrHelpfulNotHurtful]

Yay! So glad I could help. 😊

[@OBRIZZLE]

Cool thank you

[@MrHelpfulNotHurtful]

You are very welcome. I appreciate your feedback. 😊

[@ntv.asmemca]

Thank you, teacher

[@MrHelpfulNotHurtful]

You are super welcome. So glad I could help. 😊

[@betulerdem3360]

thank youuuuuu aşkosuuuuu , I solved all the questions correctly thanks to you canımsın Öpücük

[@MrHelpfulNotHurtful]

You are welcome my friend. 😊

[@LeBron652]

thankyou ,it is helpful

[@MrHelpfulNotHurtful]

Yay! I’m so glad. 😊

[@aadisingh9146]

boom boom boom...understood

[@MrHelpfulNotHurtful]

Aadi singh Awesome. Glad to help. 😎

[@eggxecution]

thank you I am having a tough time learning this formula

[@MrHelpfulNotHurtful]

So glad I could help! 😊

[@anangelsdiaries]

Nevermind: read the comments and it makes sense, my bad. For 14:31 shouldn't it be P(D intersect C) since the question is asking for coffee AND donut?

[@praneshbalasubramaniam8749]

You can just youse the And formula for #10

[@MrHelpfulNotHurtful]

Pranesh Balasubramaniam Thanks! 😎

[@praneshbalasubramaniam8749]

@@MrHelpfulNotHurtful great video though

[@nellvincervantes3223]

But they are not the same. It is 50.4% when you use P(D intersect C) = P(D)*P(C)

[@MrHelpfulNotHurtful]

@@nellvincervantes3223 Notice that the AND formula is labeled "for independent events" in the video. Events like rolling dice or flipping a coin are independent. Also, drawing a card and putting it back before drawing a second card would be independent. Buying a doughnut and buying coffee are not independent events, so you cannot use the AND formula. You must use the OR formula as shown in the video.

[@nellvincervantes3223]

@@MrHelpfulNotHurtful ok sir thank you

[@user-mi1xq5lr1w]

2024 and I am happy❤

[@MrHelpfulNotHurtful]

Yay!!!

[@mirunnue7488]

A letter is selected at random from each of the words “POOR” and “ELITE’’. ​Find the probability that two letters are selected are ​​(a) both vowels b) both consonants c) a vowel and a constant

[@MrHelpfulNotHurtful]

This requires a new video. I have a ton of work to do so I’m not sure when I can make it. If I get some free time, I will. 😎

[@meronyakobkibreab1813]

a)(2/4)*(3/5)=6/20. b) (2/4)*(2/5)=4/20. c) (2/4)*(2/5)+(2/4)*(3/5)=10/20

[@MrHelpfulNotHurtful]

@@meronyakobkibreab1813 Thank you! 💙💙

[@user-yy3xd4vl8s]

How can you tell if it is aub ain anb

[@MrHelpfulNotHurtful]

Sorry. I don’t understand the question. 😬

[@user-yy3xd4vl8s]

@@MrHelpfulNotHurtful don't worry I get it now

[@enricop.8386]

10:48

[@areezahmad1564]

What class is this for

[@MrHelpfulNotHurtful]

High school geometry

[@user-hy8mg8zp9w]

On the 10th question couldn't we just multiply the percentage of the people who buy a donut and the percentage of people who buy coffee

[@MrHelpfulNotHurtful]

Multiplying the two percentages will only give you the correct probability of two events happening when those two events are independent. We cannot assume these events are independent. The mention of a percentage of people who get a coffee or a donut basically tells you that’s these events are not independent and you must use the formula I used instead.

[@user-hy8mg8zp9w]

​@@MrHelpfulNotHurtful Yes I found out by watching your other videos, thank you

[@pearlpatel4899]

There are 7 even number in 15. These are the numbers 2,4,6,8,10,12,14. If we do it the way you did it then it will be wrong. Please recheck before uploading into KZbin. It could possibly lead someone else into confusion. But your probability techniques are accurate. Good work.

[@rebbekandahuma2173]

no, the total number of the respective numbers with different colours adds up to 15. its numbers 1-5 multiplied by the 3 distinct colours that gives you the 15. hope you get what im tryna say. 😊

[@natachaawesso8294]

Please someone can help me resolve this probability 2) Assume that the probability of experiencing homelessness among people who inject drugs is 65% . a) Pretend that we have a sample of 10 people who inject drugs. (2 points) i) Calculate the probability that none of these 10 people are experiencing homelessness. ii) Calculate the probability that 1 of these 10 people is experiencing homelessness. iii) Calculate the probability that 5 of these 10 people are experiencing homelessness. iv) Calculate the probability that at least 6 of these 10 people are experiencing homelessness.