Daniel had a small bag of erasers. The bag contained 15 blue, 10 purple, 8 yellow, 13 green, and 4 red erasers. He picked one of the erasers from the bag.
What is the probability that Daniel picked a purple eraser?
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OpenStudy (anonymous):
ok first you have to figure out how many toatal erasers there are
OpenStudy (anonymous):
so how many total are there?
OpenStudy (♪chibiterasu):
Ok, well we first add the total erasers and the sum will be our denominator. What is the sum?
OpenStudy (♪chibiterasu):
Pop out your calculator and add them numbers :c
OpenStudy (anonymous):
50. I used an online one because lazy (:
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OpenStudy (anonymous):
but do you know why you have to add the numbers?
OpenStudy (♪chibiterasu):
To use the sum as a denominator I said that before.
OpenStudy (anonymous):
yes but why
OpenStudy (anonymous):
I know why but I wanna know if she knows why
OpenStudy (♪chibiterasu):
This is probability, we need the total to get it.
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OpenStudy (anonymous):
I don't know why, no. I want to punch math in the face.
OpenStudy (anonymous):
Thank god this is my last question.
OpenStudy (anonymous):
think of it as a smaller scale lets say we have quarters ok?
OpenStudy (♪chibiterasu):
He's in the chat, leaving.
OpenStudy (anonymous):
so you put 4 quarters into a bag one being blue, one being red, one being purple, and one being orange. follow?
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OpenStudy (anonymous):
now what are the chances of you pulling a blue one out?
OpenStudy (anonymous):
since we have a toatal of 4 quarters its going to be something /4
OpenStudy (anonymous):
That makes sense.
OpenStudy (anonymous):
and we have ONE blue ONE orange ONE red ONE purple what are the chances of pulling out a purple one?
OpenStudy (anonymous):
erm 1. but I'm wrong ha.
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OpenStudy (anonymous):
CORRECT!
OpenStudy (♪chibiterasu):
1/4 that is
OpenStudy (anonymous):
:O
OpenStudy (anonymous):
since we have a total of 4 and there is only 1 purple one the chances are 1 out of 4 or 1/4
OpenStudy (anonymous):
ew though it isn't an option haha
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OpenStudy (♪chibiterasu):
You see, the total amount is the denominator, the bottom number in the fraciotn
OpenStudy (anonymous):
now your prob is just like my example but on a bigger scale
OpenStudy (anonymous):
ok so
OpenStudy (anonymous):
oh wait this is the example sorry c:
OpenStudy (♪chibiterasu):
Indeed, add the erasers and use that as the bottom number.
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OpenStudy (anonymous):
how many blue erasers do you have in your problem?
OpenStudy (♪chibiterasu):
You already did it so I guess we can continue:
?/50
OpenStudy (♪chibiterasu):
? being the blue erasers
OpenStudy (anonymous):
chib relax just take it slow so she understands it
OpenStudy (anonymous):
15.
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OpenStudy (anonymous):
ok good now how many purple?
OpenStudy (anonymous):
10.
OpenStudy (anonymous):
now how many yellow green and red ones?
OpenStudy (♪chibiterasu):
We only need to know the purple . . .
OpenStudy (anonymous):
YEAH haha why are we going over all this?
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OpenStudy (anonymous):
dude just let me explain so she actually understands it and not just a answer
OpenStudy (anonymous):
because I want you to understand how to get the answer
OpenStudy (anonymous):
How do I find out how many purples there are?
OpenStudy (♪chibiterasu):
Well you don't need to explain what the question answers itself.
OpenStudy (anonymous):
I will if you would relax
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OpenStudy (♪chibiterasu):
10 purples, yeah.
OpenStudy (anonymous):
or that Daniel will choose one my bad
OpenStudy (anonymous):
just giving her a answer obvi isn't helping because shes posted about 4 of these questions
OpenStudy (anonymous):
I just didn't ask for an explanation because I was focusing on finishing my assignment first lol
OpenStudy (anonymous):
but that's not how open study works
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OpenStudy (anonymous):
YEAH I was told that.
OpenStudy (anonymous):
lol :)
OpenStudy (anonymous):
So everyone should stop attacking me and help because that is what I am here for (:
OpenStudy (anonymous):
ive been trying to help -_-
OpenStudy (anonymous):
But I don't understand why you're going over all the colors.
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OpenStudy (♪chibiterasu):
^^
OpenStudy (anonymous):
It's literally taking me an hour for this one question...
OpenStudy (anonymous):
just listen and youll see
OpenStudy (anonymous):
answer my question now how many yellow green and red ones
OpenStudy (anonymous):
CHIB HELP
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OpenStudy (♪chibiterasu):
Okay, there are 10 purples, right?
OpenStudy (anonymous):
Yes.
OpenStudy (♪chibiterasu):
And we know there are 50 total erasers so, what would our fraction be?
?/?
OpenStudy (anonymous):
10/50?
OpenStudy (anonymous):
o.o
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OpenStudy (♪chibiterasu):
Yes! But is that the answer?
OpenStudy (anonymous):
No.
OpenStudy (♪chibiterasu):
Indeed! We need to simplify. Now what number can be divided into both 10 and 50?
OpenStudy (anonymous):
The THING IS
OpenStudy (anonymous):
I have never cared about school, math in particular and I never asked for help... so simplifying yeah um what. Plus my memory is bad.
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OpenStudy (♪chibiterasu):
Well, 10 is divisible between both 10 and 50. So let's divide:
10/10 = 1
50/10 = 5
What is our final answer now?
OpenStudy (anonymous):
LOL that guy is giving me a gold medal now. I swearrrr.
OpenStudy (♪chibiterasu):
I got one too.
OpenStudy (♪chibiterasu):
Our final answer? :/
OpenStudy (anonymous):
1/5
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OpenStudy (♪chibiterasu):
Yes ;3
OpenStudy (♪chibiterasu):
I don't think you should drop out of school just for math. If you can't understand it, just ask for help. That will prevent you from dropping out. It's better to get a good education instead of quitting on it.
OpenStudy (anonymous):
96% (: now I know all the stuff on the pretest. ew now I have assignments haha
OpenStudy (♪chibiterasu):
Lol, good luck ;P
OpenStudy (usarmy3947):
ya man why u wana drop out of school thats bad
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OpenStudy (anonymous):
I have reasons it isn't just for math c:
OpenStudy (usarmy3947):
look i know school is boring but u know i have thing to think about so i dont drop out
OpenStudy (anonymous):
You don't know a single thing about me so I'm gonna you know, go and you should too. This question is closed. Toodles x