Spin the Spinner In Exercises 27–30, assume that the spinner cannot land on a line. Determine the probability that the spinner lands on (a) red, (b) green, (c) yellow, (d) blue.

Question

anonymous · Answer

attachment

anonymous · Answer

The probability that the spinner land on a red is 4/8 or 1/2.  The probability that the spinner lands on a blue is 2/8 or 1/4.  The probability that the spinner lands on a green is 1/8, and the probability that the spinner lands on a yellow is 1/8.  That help or do you need the percentages?

anonymous · Answer

the first time I did it was like this 


circle is 1/2 green, 1/4 red, and 1/4 yellow. probability that the spinner lands on P(red) = 1/4 P(green)= 1/2 P(yellow) = 1/4 P(blue) = 0

anonymous · Answer

my Instructor said it's not good

ganeshie8 · Answer

how u say circle is 1/2 green ?

ganeshie8 · Answer

could u pls justify why u think it is half green... .

anonymous · Answer

it the only one there

ganeshie8 · Answer

u mean only one green slice is there ?

ganeshie8 · Answer

thats right, but that slice is not occupying HALF  of the circle. 

it is occupying less than half, right ?

ganeshie8 · Answer

so you can't say "circle is 1/2 green"

anonymous · Answer

ok

ganeshie8 · Answer

you're right on track with ur first step - that you tried to find how much region is green

ganeshie8 · Answer

to find it, first notice that circle is divided into slices of different colors

ganeshie8 · Answer

can u tell how many total slices are there ?

ganeshie8 · Answer

you may just count one by one...

anonymous · Answer

8 slices

ganeshie8 · Answer

of of those 8 slices, how many are green ?

anonymous · Answer

1

ganeshie8 · Answer

so probability for getting green = $\frac{\textbf{number of green slices}}{\textbf{total number of slices}}$

$\=  \frac{1}{8}$

ganeshie8 · Answer

does this help...

anonymous · Answer

yes

ganeshie8 · Answer

glad to hear :D

ganeshie8 · Answer

can you try remaining questions now... ?

ganeshie8 · Answer

use the same method :
probability for getting red = $\frac{\textbf{number of red slices}}{\textbf{total number of slices}}$

$=\frac{?}{8}$

anonymous · Answer

4

ganeshie8 · Answer

thats right ! so u have 4 red slices. so whats the probability for red ?

anonymous · Answer

the probability for red is 4/8

ganeshie8 · Answer

perfect !
good luck with rest of the q :D

anonymous · Answer

thank you

ganeshie8 · Answer

np..