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Mathematics 9 Online
OpenStudy (bambimonster):

see attachment

OpenStudy (bambimonster):

e)*is cherry

OpenStudy (anonymous):

do u have to figure that out for each of the bowls?

OpenStudy (bambimonster):

i think its two bowls together

OpenStudy (anonymous):

that's worse

OpenStudy (anonymous):

just put this answer, unless you are blind just grab out whatever flavour you like.

OpenStudy (bambimonster):

OpenStudy (bambimonster):

sorry maybe i was wrong, do u mind looking at the pic i just attached

OpenStudy (bambimonster):

OpenStudy (anonymous):

so we have to add both bowls together? is this for an assignment, are you being marked on this?

OpenStudy (bambimonster):

yeah am being marked.. idk for d, e...

OpenStudy (anonymous):

so there are: adding both bowls together: 10 Grape 10 Lemon 10 Cherry 10 Raspberry do you agree?

OpenStudy (anonymous):

so each flavour has a 10/40 chance or probability: 25%

OpenStudy (anonymous):

meaning that if you want to select a grape and you are blind and cant see, you have a 25% chance of selecting grape, that is not good odds btw.

OpenStudy (bambimonster):

hey this is for d?

OpenStudy (anonymous):

now to workout D: what to do? hmmm

OpenStudy (anonymous):

what is the probability of selecting two flavours which are the same?

OpenStudy (bambimonster):

can it be 1 minus the answer in C

OpenStudy (anonymous):

sorry different colours.

OpenStudy (bambimonster):

answer in c is 0.2150 i was graded and my ans is right

OpenStudy (anonymous):

yeah that sound familiar there are formulas for this.

OpenStudy (anonymous):

what was your workings for c?

OpenStudy (bambimonster):

do u know where i can get the formulas? i dont see it in my notes.. working for c:4/20×6/20+5/20×5/20+8/20×2/20+3/20×7/20

OpenStudy (ybarrap):

ok, so you are half there if you know the answer to c, I get the same thing Now P(different) = 1 - P(same)

OpenStudy (bambimonster):

okay thanks! so it shud be 0.785... and for e.. is the working like this: first is lemon, 5/20 second is cherry 2/20 both 5/20×2/20 add the first two, subtract the third (5/20+2/20)-(5/20×2/20)=0.325

OpenStudy (anonymous):

thanks ybarrap, bambi have you been marked yet, was it right?

OpenStudy (bambimonster):

@Helpmeplease99 i dont wanna submit yet till im done, because i only have 2 more attempts :(

OpenStudy (ybarrap):

Here is your tree for probability of color X give Bowl Y: |dw:1375313979171:dw|

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