OpenStudy (anonymous):

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

2 years ago
OpenStudy (anonymous):
2 years ago

OpenStudy (studygurl14):

Find the probability of landing on A. Find the prob of landing on B. Find the prob of landing on C. Multiply all three probabilities together.

2 years ago
OpenStudy (studygurl14):

I am assuming this is drawn to scale?

2 years ago
OpenStudy (welshfella):

the probabilities are multiplied because each spin is independent of the previous one

2 years ago
OpenStudy (anonymous):

so how would i multiply them?

2 years ago
OpenStudy (studygurl14):

Just multiply them together. But first find the probability of landing on A, B, and C.

2 years ago
OpenStudy (anonymous):

3 times A b c ?

2 years ago
OpenStudy (anonymous):

@dan815

2 years ago
OpenStudy (anonymous):

@Preetha

2 years ago
OpenStudy (mathmate):

P(A)=1/4 P(B)=1/4 P(C)=1/4 In cases where the steps of experiments are independent (i.e. one outcome does not affect the others), you would multiply the probabilities, i.e. P(ABC)=P(A)*P(B)*P(C) Multiplying by 3 is equivalent to adding them together which does not give the correct answer in this case.

2 years ago
OpenStudy (anonymous):

so im going to multiply 1/4? @mathmate

2 years ago
OpenStudy (mathmate):

Tell me how you do that, please.

2 years ago
OpenStudy (anonymous):

well you put P(ABC)=P(A)*P(B)*P(C) So i was thinking 1/4*1/4*1/4 lol sorry i dont know how to do probability

2 years ago
OpenStudy (mathmate):

That sounds promising. What do you get?

2 years ago
OpenStudy (anonymous):

0.25

2 years ago
OpenStudy (mathmate):

Can you put 1/4*1/4*1/4 on a calculator? I get a different number, perhaps I have made a mistake.

2 years ago
OpenStudy (anonymous):

Yes on google

2 years ago
OpenStudy (mathmate):

that's ok too!

2 years ago
OpenStudy (mathmate):

What do you get?

2 years ago
OpenStudy (anonymous):

when i multiply them? 0.25..

2 years ago
OpenStudy (mathmate):

did you put 1/4*1/4*1/4 into google?

2 years ago
OpenStudy (anonymous):

Yes

2 years ago
OpenStudy (mathmate):

and you got 0.25?

2 years ago
OpenStudy (anonymous):

yes

2 years ago
OpenStudy (mathmate):

Did you put in 1/4*1/4*1/4 ?

2 years ago
OpenStudy (anonymous):

Yes

2 years ago
OpenStudy (anonymous):

do you know the answer?

2 years ago
OpenStudy (mathmate):

I get a totally different answer, much smaller than 0.25. Are you sure you put in all the numbers in 1/4*1/4*1/4, i.e. 3 ones, 3 fours, separated by * and / exactly as shown?

2 years ago
OpenStudy (anonymous):

ahhhhh lol now im getting a diff answer also 0.015625

2 years ago
OpenStudy (anonymous):

1/64

2 years ago
OpenStudy (mathmate):

That is correct! It took a little while, but it's worth the work and time! congrats.

2 years ago
OpenStudy (anonymous):

Thank You!

2 years ago
OpenStudy (mathmate):

You're welcome! :)

2 years ago