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anonymous
 one year ago
Maria will spin the arrow on the spinner 3 times.
What is the probability that the arrow will stop on A, then B, then C?
A. 3/256
B. 1/64
C. 1/12
D. 3/4
http://static.k12.com/calms_media/media/1419500_1420000/1419788/1/c5ef10c6f32d00fbcd3ddf9e21dbc3b4f9747860/MS_Alg_130926_181907.jpg
anonymous
 one year ago
Maria will spin the arrow on the spinner 3 times. What is the probability that the arrow will stop on A, then B, then C? A. 3/256 B. 1/64 C. 1/12 D. 3/4 http://static.k12.com/calms_media/media/1419500_1420000/1419788/1/c5ef10c6f32d00fbcd3ddf9e21dbc3b4f9747860/MS_Alg_130926_181907.jpg

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mathmate
 one year ago
Best ResponseYou've already chosen the best response.2For one single spin, what is probability that it stop on A?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thats what i thought, but wasnt sure

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2I mean the probability of a single spin resting on B?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0OH...1/4 also i believe

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2Yes, can we say the same thing for C?

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2So getting A, followed by B, followed by C is a three step experiment, where each step is independent of each other. Under these circumstances, the probability of success in all three steps is the product of the probability of each step.

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2Product means multiply them together.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I did not meen to say that

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2This is called the multiplication rule!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so multiply 1/4 to the third power

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2To avoid communication errors, I prefer you to type the answer itself, not the letters. But no, it's not A. Did you multiply together the probabilities of each of the three steps?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes and yes A is wrong i think it is 1/64

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2The work you should have shown is 1/4 * 1/4 * 1/4 = 1/64.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh i did not know i had to show work im really knew to this...also do you know how to medal people? Also was my awnser right

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@mathmate Thanks for the help just finished and got a 100% :)

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2Yes, 1/64 is right. I usually ask for showing work to make sure you're on the right track. Some students guess, and I don't need that for math.

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2I thought you already gave me a medal, although you don't have to. You would give a medal to someone who gave you help, and you give the medal to show appreciation by giving him/her a medal. You do this by clicking on the blue "best response" button on the right of the receiver's response. BTW, Welcome to Open Study! We're a nice family that you'd enjoy for a long time. Please read the code of conducts, terms and conditions (links at bottom left). Also, be netaware, do not give out personal information, or traceable information. This is not a dating site, so if someone sends you undesirable messages, click on the "report abuse" button at the bottom of his/her post.

Loser66
 one year ago
Best ResponseYou've already chosen the best response.0@mathmate can I have question on it? I don't know what is wrong with my logic but no one answer me for my question

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2@Loser66 yes, please tag me.

Loser66
 one year ago
Best ResponseYou've already chosen the best response.0No, this kind of problem. I don't have any thing else

Loser66
 one year ago
Best ResponseYou've already chosen the best response.0The probability to get A is 1/4, sure. But!! to get A at the first spin, it is another topic!!!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@mathmate thanks for the introduction to study island and also thanks for explaining the medals thing.

Loser66
 one year ago
Best ResponseYou've already chosen the best response.0My argument: at the first spin, we want the outcome is A, that means it is NOT B and NOT C and NOT D as well.

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2@Loser66 You are right. If you would like to complete the answer, please go ahead. This has to do with the basic axioms of probability.

Loser66
 one year ago
Best ResponseYou've already chosen the best response.0for B: the probability is 1/4, hence NOT B is 3/4 same as NOT C and NOT D, hence , combine them, to get NOT (B and C and D) = A, the probability to be SURE that is A is (0.75)^3

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2Exactly. Each of A,B,C,D has equal probability of 1/4 (4*1/4=1).

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2If you make a single spin, the probability of landing on A is 1/4. Do we agree on this ?

Loser66
 one year ago
Best ResponseYou've already chosen the best response.0That is my question. What is wrong with it?? to force the first spin is A , we need NOT B and NOT C and NOT D but that argument gives us different result from just pick 1/4 for A

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2Landing on A implicitly tells us that it is not B, not C and not D. So the conditions are superfluous.

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2dw:1432949835677:dw A,B,C,D are mutually exclusive and complementary.

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2So if you specify A, automatically it excludes the others.

Loser66
 one year ago
Best ResponseYou've already chosen the best response.0AAAhh, I got you!!! "EXCLUSIVE" thanks for explanation. gooooooooooooot it

Loser66
 one year ago
Best ResponseYou've already chosen the best response.0Surely help. I hate probability, but love logic. hehehe...

mathmate
 one year ago
Best ResponseYou've already chosen the best response.2Probability is nice, but there are a lot of terms to remember, and their definitions.
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