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Mathematics 22 Online
OpenStudy (anonymous):

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?

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 (:

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.

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?

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.

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

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.

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.

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?

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

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

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.

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

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

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.

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

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

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

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