Question

help with probability

Answer 1

would either blue or purple be 1/2 what?
and what do you mean when you say, "is a green block and has a number on it? "

Answer 2

im asking if for the questions "would either be blue or purple" equal 1/2(my answer)

Answer 3

neither blue or purple equal half

Answer 4

thats my first question lol and the other one is my second question that I need help finding

Answer 5

there are 14 blocks, and there are only 4 blue blocks and 3 purple blocks, added together they equal half.

Answer 6

And none of the green blocks have numbers on them, they all have letters, so 0/14

Answer 7

P(blue OR purple) is the first question?
Looks like you figured that out already.

What's the other one?
P(green AND number) = ?

Answer 8

yes

Answer 9

Ya, like the other gal said D:
No green blocks have # of them... so 0/14

Answer 10

oh ok but what if there were numbers on it lets say 2 of the green blocks had numbers on them would it be 2/14?

Answer 11

mmmm ya that sounds right :)

Answer 12

alright thank you :)

Answer 13

@zepdrix may I ask one more?

Answer 14

what about if it said is a either a blue block or has a letter on it?

Answer 15

3/14

Answer 16

but how, can you explain it I want to understand it too

Answer 17

Remember this word OR means that we're ADDING stuff together :)

Answer 18

4 blue
8 letter

and then we subtract the intersection
there are 2 blue/letter blocks

Answer 19

but this one says either which confuses me

Answer 20

yeah so there are four blue blocks, and three of them have letters on them and 1 have a number so 3/14, or is it blue blocks and blue blocks with letters, If so that mean 7/14

Answer 21

If it says either that means the number of blue blocks and then add the number of blue blocks with letters. So BB(blue blocks) and BBL(blue blocks and letters. BB+BBL

Answer 22

oh ok thank you for explaining :) @zepdrix do you agree?

Answer 23

I don't know.
I don't remember the question +_+

Answer 24

what about if it said is a either a blue block or has a letter on it?
but this one says either which confuses me

Answer 25

The question was ,"what about if it said is a either a blue block or has a letter on it?"

Answer 26

blue block = 4
letter on block = 8
blue block with letter on it = 2

This is sort of how I was trying to explain it in the last problem with the deck of cards :U
P(blue OR letter) = P(blue) + P(letter) - P(intersection)
P(blue OR letter) = 4 + 8 - 2

10 of the 14 blocks are EITHER blue OR have a letter on them.

Answer 27

Oh a letter on any color? I thought you were asking blue with a letter and blue in general.

Answer 28

well that just confused me more lol now im not sure because my questions just literally says that either a blue block or has a letter on it

Answer 29

ok so it's just blue blocks and any color blocks with a letter on it :D, so count the blocks with letters and then count the blue blocks, and then add that up and put that over 14 :D

Answer 30

There is a big difference between the words
OR / AND

Answer 31

So which does it use? :)

Answer 32

LOL, yeah?

Answer 33

it uses or

Answer 34

ya, so you count up the blocks which are `blue` ORRRRR the ones which have `a letter` (being careful not to count a block twice).

Answer 35

letters=8
blue=4

Answer 36

Yes, but there is a little overlap in that right? :)
You counted a couple blocks twice,
because two of the blue blocks have letters on them.

Answer 37

yes

Answer 38

so subtract the overlap :d

letter: 8
blue: 4
blue/letter:2
4+8-2=10

Answer 39

so then 10/14?

Answer 40

Hopefully that makes sense to you.
You counted the blue/letter blocks in the `blue group`,
but you also counted them in the `letter group`.

So you counted them twice.

Answer 41

Yes, 10/14 :)

Answer 42

alright thank you both so much for your help :)

Answer 43

yay team \c:/

Answer 44

Yay, you got it, so do you understand now?

Answer 45

yes thank you but I do have a question about the one with 0/14 because what would have happened if it had one letter or two for example how would the 0 change, would it had changed to 1/14 or 1/3 because there are 3 green blocks?

Answer 46

that confuses me

Answer 47

Um can you copy and paste that question again please?

Answer 48

ok lets say for example that a red block has a letter on it would it be 1/14 or would it be 4+8-1/14?

Answer 49

the red blocks do have letters on them, you mentioned 0/14, so explain from there!! :D

Answer 50

no lol that was for green I just gave the example of the red just to make sure I understood :)

Answer 51

ok let me see:D

Answer 52

alright :)

Answer 53

Lets use green as an example, because it has no numbers. Lets say that the green block with a "A" on it has a "2" on it.

Answer 54

alright would it be 8+2-1/14 then?

Answer 55

No, close but not exactly. But i'll help you, so whats the probability of getting a green block? And whats the probability of getting a block with a number?

Answer 56

There are 7 blocks with letters(imagining that the "A" green block, has a "2". And then there are 3 green blocks, but we already counted one of those green blocks so it's really like there are only two green blocks.

Answer 57

but wouldnt it be 8 for the letters like the last example?

Answer 58

OMG I was doing numbers

Answer 59

LOL, are we doing numbers or letters?

Answer 60

thats why I gave the example of the red boxes lol

Answer 61

Danielle, you should try to make your question a little bit more clear.
"What is the probability that a randomly selected block will be either Red or have a letter on it?"

Is that the question?

Answer 62

yes exactly!

Answer 63

OK

Answer 64

So what do you think the answer is?

Answer 65

4+8-1

Answer 66

11/14?

Answer 67

Exactly, great job!

Answer 68

alright thank you! :)

Answer 69

You are welcome, If you need anymore help just ask, and feel free to message me :D

Answer 70

alright thank you very much :)

Answer 71

Good luck!