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TSIA2 MATH SECTION: Probability Questions
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- Опубликовано: 26 авг 2022
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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!!
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!!!
thank you! i was able to pass my tsi bc of your reviews :D
That's so awesome!! I'm so proud of you!!!
What kinds of questions were on there if you don't mind me asking
@@josiahademiluyi4677did you ever get an answer? curious as well
@@abbyrosario7960 No I didn’t
@@josiahademiluyi4677When are you doing your test?
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
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😊
@@avakinbetcii2349so we’re NOT trying to get 35 cents or higher because she was doing the opposite first right??
I would had never thought of it that a way...bravo
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!!
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?
So for the last section, would the rule be do the opposite? Because its states combined. Thank you
for question 16 where did you pull the 1 from when it was 1 - 5/18?
Please let me know if someone tells you! I’m confused on that too
The 1 is another way of saying the total amount of possible answers. 1 is the same as 100%.
@@makeitmakesense1504aren’t there more than 1 possible answers? I really don’t understand and I’ve watch 5 videos on it already
@@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)
@@Maryam07bro samee 😭 I don’t get it like I was fine when we got 5/18 and boom lost afterwards 💀
Omg you explained it so good!!!
I'm so glad! Thank you!!!
I don’t understand why 18/18 - 5/18 is 13/18. Wouldn’t 18-18 be 0. Plz explain
Great question! You don’t subtract the denominators (or the numbers on the bottom) only subtract the numbers on top.
This helped a lot! Thank you!
You’re welcome!, I’m so glad!!
@@makeitmakesense1504 I was able to pass the TSIA2 because of your videos!! Appreciate all your work
@@rushyrush6433 I’m so happy to hear that!!!
Yay!!!
Why does the 1 equal 18 over 18?
If you divide 18/18 it is equal to 1.
@@makeitmakesense1504 but why is the answer 13/18? I don’t understand how the 1 becomes 18/18
@@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.
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.
Thank you ms amber
Why did she choose 4 as the number to device 20 over 72?
She wanted to simply the fraction and 4 goes into both 20 and 72.
@@nyoungpark8853doesn’t 2 go into both numbers too?
@@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
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
i dont understand why you would look for the probability of coins total, that would not equal 35 cents
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.
@@makeitmakesense1504but you could pull 2 25 cents
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.
Are these the actual questions?
This is the official practice test and the questions on the test will be similar!
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…
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.
@@makeitmakesense1504 i had the same question and that makes so much sense. the key is " at least ". thank you
@@melodyrodriguez765 you're so welcome!
i don't understand where is 4/8 come from 😭
Aw Im sorry, at what point did I lose you?
I offer tutoring if you need it, please email me if you are interested amberrae50@gmail.com :)
@@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.
Thank you so much for you reply my comment ma’am ❤️❤️
@@mekdelatadesse you’re very welcome! Keep them coming!
this makes no sense to me, why does 1/1 = 18/18?????
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%.