TSIA2 MATH SECTION: Probability Questions

[@_yeriko]

Hi Ms. Amber!! Just wanted to let you know that I have been binging for videos for the past 2 weeks preparing for the math tsi (which I was sooo unprepared for bcz ive been out of school for a bit) and because of your amazing teaching skills and teaching style I went from completely lost to pretty confident in my math skills again and yesterday I PASSED IT!! Dont mean to make this too long but I just wanted time to sincerely thank you for your hard work and let you know that you are changing peoples lives!! You are the only reason I passed and i’m so thankful to you!!

[@makeitmakesense1504]

Aw this made my whole world!! Thank you so very much for coming back and letting me know!! You must have had it in you all along!!! Well done!!!

[@vweepvwoop7860]

thank you! i was able to pass my tsi bc of your reviews :D

[@makeitmakesense1504]

That's so awesome!! I'm so proud of you!!!

[@josiahademiluyi4677]

What kinds of questions were on there if you don't mind me asking

[@abbyrosario7960]

@@josiahademiluyi4677did you ever get an answer? curious as well

[@josiahademiluyi4677]

@@abbyrosario7960 No I didn’t

[@Miku_squ]

@@josiahademiluyi4677When are you doing your test?

[@howlingmedia4354]

I would had never thought of it that a way...bravo

[@makeitmakesense1504]

Thank you!! But to be honest, I don't think it was me who came up with solving it this way! So happy my videos are helping you!!

[@projecterikahun2306]

Well my question here now if why chose 10 cents and not 25c and then if you did 25 . Instead would the answer have been the same

[@avakinbetcii2349]

No, the question says at least 35 cents, its looking for greater than or 35 cents. Getting 20 cents makes it more approachable. Hope I was able to help😊

[@karMa0117]

@@avakinbetcii2349so we’re NOT trying to get 35 cents or higher because she was doing the opposite first right??

[@yuyusassaso4912]

Omg you explained it so good!!!

[@makeitmakesense1504]

I'm so glad! Thank you!!!

[@zaynabh.6745]

for question 16 where did you pull the 1 from when it was 1 - 5/18?

[@Anna-ie5ck]

Please let me know if someone tells you! I’m confused on that too

[@makeitmakesense1504]

The 1 is another way of saying the total amount of possible answers. 1 is the same as 100%.

[@Maryam07]

@@makeitmakesense1504aren’t there more than 1 possible answers? I really don’t understand and I’ve watch 5 videos on it already

[@isayah334]

@@Maryam07 There are more than 1 answer but all those answer are just pieces of a whole 100%. Like 5/18 was the answer we got for NOT getting 35 cents, but it's just a piece of the whole 100%...it's only 27.78%. Using 1 represents that 100% just like 5/18 could represent 27.78% Comparing a simple equation like "19 + ___ = 100" helped me understand a little better. I have one part of the equation so, I can just subtract 19 from 100 to get my answer (sorry this is late lol, hope it made sense)

[@Redditstories189]

@@Maryam07bro samee 😭 I don’t get it like I was fine when we got 5/18 and boom lost afterwards 💀

[@rushyrush6433]

This helped a lot! Thank you!

[@makeitmakesense1504]

You’re welcome!, I’m so glad!!

[@rushyrush6433]

@@makeitmakesense1504 I was able to pass the TSIA2 because of your videos!! Appreciate all your work

[@makeitmakesense1504]

@@rushyrush6433 I’m so happy to hear that!!!

[@makeitmakesense1504]

Yay!!!

[@currentlykesh]

So for the last section, would the rule be do the opposite? Because its states combined. Thank you

[@AzureKite191]

Why does the 1 equal 18 over 18?

[@makeitmakesense1504]

If you divide 18/18 it is equal to 1.

[@AzureKite191]

@@makeitmakesense1504 but why is the answer 13/18? I don’t understand how the 1 becomes 18/18

[@makeitmakesense1504]

@@AzureKite191 probability is out of 100%. So because the denominator is 18, 100% of 18 would be 18/18.And that is equal to 1.

[@makeitmakesense1504]

For example. If I told you 1/2 kids pass a math test and I asked you to find out how many do not pass. You would take 100% (the total amount of all the kids) subtract the amount of kids that did pass and you would get the amount of kids that didn’t pass. Because you can’t take a percentage and then subtract a fraction, you can write 100% as the number 1, or you can write it as 2/2 which is equal to 100%. Now that you have a fraction 2/2 you can subtract 1/2 and get 1/2 or the amount of students who didn’t pass. 100% asa fraction is whatever the denominator is, the numerator should be the same number. In the example of the video, 18 was the denominator, so 100% as a fraction would be 18/18.

[@YoungGuruFreestyles]

Thank you ms amber

[@hadipression]

when I did it the hard way: I got (10. , 25). ( 25. , 25) (5/9 x 4/8) + (4/9 x 3/8) = 4/9 I don’t get why?

[@GryphonM]

Why did she choose 4 as the number to device 20 over 72?

[@nyoungpark8853]

She wanted to simply the fraction and 4 goes into both 20 and 72.

[@The1realro]

@@nyoungpark8853doesn’t 2 go into both numbers too?

[@elfamosoabraham5880]

@@The1realro yes she also mentioned in another video if you’re not sure how to simplify for just do by 2 over and over until the numbers are not even

[@1000lupita]

I don’t understand why 18/18 - 5/18 is 13/18. Wouldn’t 18-18 be 0. Plz explain

[@makeitmakesense1504]

Great question! You don’t subtract the denominators (or the numbers on the bottom) only subtract the numbers on top.

[@RichardAllenCramer]

Yeah, after you draw your pics, complete your test and then toss it in the trash because you will NEVER use it again in life.

[@nicolereyes9042]

Are these the actual questions?

[@makeitmakesense1504]

This is the official practice test and the questions on the test will be similar!

[@ericam8374]

i dont understand why you would look for the probability of coins total, that would not equal 35 cents

[@makeitmakesense1504]

That's a great question! The reason I chose to do it this way was simple: There are multiple ways to get two coins that are at least 35 cents: 1st way- pick a dime,then a quarter 2nd way- Pick a quarter then a dime 3rd way, pick a quarter then another quarter. But there is only one way to get two coins that are not equal to 35 cents: pick a dime and then pick a dime. So instead of getting lost in the finding the probability of multiple combinations of getting "at least 35 cents", I chose to find the probably of the only one way to "not get at least 35 cents" and subtract that from the total number of possibilities.

[@TherealBdawg]

@@makeitmakesense1504but you could pull 2 25 cents

[@mekdelatadesse]

i don't understand where is 4/8 come from 😭

[@makeitmakesense1504]

Aw Im sorry, at what point did I lose you?

[@makeitmakesense1504]

I offer tutoring if you need it, please email me if you are interested [e-mail] :)

[@mekdelatadesse]

@@makeitmakesense1504 i think I got the answer but at first I didn’t get it where 4/8 come from after you got 5/9.

[@mekdelatadesse]

Thank you so much for you reply my comment ma’am ❤️❤️

[@makeitmakesense1504]

@@mekdelatadesse you’re very welcome! Keep them coming!

[@aidenpursley4607]

I’m sorry I’m stuck only on how 1 was equal to 18/18 everything else is pretty solid to me for the most part

[@judithr6714]

18 divided by 18 is 1

[@blane2056]

this makes no sense to me, why does 1/1 = 18/18?????

[@makeitmakesense1504]

That's an excellent question. All probability is out of 100%. 100% can be shown in fraction form by having the numerator and the denominator being the same. For example: If I had a pizza with 8 slices, and I ate 100% of that pizza. I ate 8/8 slices. So in this case, if 18 is the denominator, 18/18 would represent 100%.

[@thefostonfamily]

why’d you choose two 10cent coins instead of two 25cent coins?? i don’t get it. two 25 cents coins wouldn’t equal 35cents either…

[@makeitmakesense1504]

Great question: Here is an answer that I gave other students who asked something similar: The reason I chose to do it this way was simple: There are multiple ways to get two coins that are at least 35 cents: 1st way- pick a dime,then a quarter 2nd way- Pick a quarter then a dime 3rd way, pick a quarter then another quarter. But there is only one way to get two coins that are not equal to 35 cents: pick a dime and then pick a dime. So instead of getting lost in the finding the probability of multiple combinations of getting "at least 35 cents", I chose to find the probably of the only one way to "not get at least 35 cents" and subtract that from the total number of possibilities.

[@melodyrodriguez765]

@@makeitmakesense1504 i had the same question and that makes so much sense. the key is " at least ". thank you

[@makeitmakesense1504]

@@melodyrodriguez765 you're so welcome!