Q11 2001 hsc (1 Viewer)

[har]

http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2001exams/pdf_doc/gen_mathemat_01.pdf

Q11, tell me what the answer is, and why?
Cheers

 

[enoilgam]

EDIT: Now Im not sure.

 

[ali-fc]

answer is C

 

[ali-fc]

i pretty much gives u the answer in the qustion

"The arrow is spun and will point to one of the four colours when it stops"

 

[D94]

1/4.

It doesn't matter what color it stops on the first time, it just depends on the color it stops on the second time.

 

[soloooooo]

A

 

[har]

I could of sworn it would of been 1/4 x 1/4 = 1/16 ...

 

[Peeik]

It is definitely (C).

Probability in first turn = 4/4 = 1
Probability in second turn = 1/4

Therefore the prob is 1*(1/4)=1/4.

Har, your response above is the probability of picking a 'specific' colour in both turns. The question didnt specify a colour, rather they just wanted the same colour in both turns.

 

[har]

It is definitely (C).

Probability in first turn = 4/4 = 1
Probability in second turn = 1/4

Therefore the prob is 1*(1/4)=1/4.

Har, your response above is the probability of picking a 'specific' colour in both turns. The question didnt specify a colour, rather they just wanted the same colour in both turns.

Makes sense, thank you. and everyone else too