anonymous
  • anonymous
A spinner is divided into many sections of equal size. Some sections are red, some are blue, and the remaining are green. The probability of the arrow landing on a section colored red is 9 over 20. The probability of the arrow landing on a section colored blue is 6 over 20. What is the probability of the arrow landing on a green-colored section?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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jim_thompson5910
  • jim_thompson5910
hint: all of the probabilities must add to 1
anonymous
  • anonymous
does anyone understand this
anonymous
  • anonymous
so what does it mean?

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More answers

jim_thompson5910
  • jim_thompson5910
x = probability of landing on green \[\Large \frac{9}{20}+\frac{6}{20}+x = 1\] are you able to solve for x ?
anonymous
  • anonymous
no cause i have lots of math to do
anonymous
  • anonymous
ill try
jim_thompson5910
  • jim_thompson5910
first combine the fractions on the left side
jim_thompson5910
  • jim_thompson5910
tell me what you get
anonymous
  • anonymous
|dw:1438823076684:dw|
jim_thompson5910
  • jim_thompson5910
good
jim_thompson5910
  • jim_thompson5910
we have this now \[\Large \frac{15}{20}+x = 1\]
jim_thompson5910
  • jim_thompson5910
subtract 15/20 from both sides \[\Large \frac{15}{20}+x = 1\] \[\Large \frac{15}{20}+x-\frac{15}{20} = 1-\frac{15}{20}\] \[\Large x = 1-\frac{15}{20}\] \[\Large x = ???\]
anonymous
  • anonymous
idk
jim_thompson5910
  • jim_thompson5910
try to think of the "1" as "20/20"
anonymous
  • anonymous
14/20
jim_thompson5910
  • jim_thompson5910
try again
jim_thompson5910
  • jim_thompson5910
\[\Large x = 1-\frac{15}{20}\] \[\Large x = \frac{20}{20}-\frac{15}{20}\] \[\Large x = ??\]
anonymous
  • anonymous
5/20
jim_thompson5910
  • jim_thompson5910
correct, which reduces to 1/4
anonymous
  • anonymous
which is the answer
jim_thompson5910
  • jim_thompson5910
5/20 is equivalent to 1/4. I just reduced
jim_thompson5910
  • jim_thompson5910
it's always a good idea to reduce fractions as much as possible
anonymous
  • anonymous
that is nt an answer choice
anonymous
  • anonymous
@jim_thompson5910
jim_thompson5910
  • jim_thompson5910
what answer choices do they give you?
anonymous
  • anonymous
The probabilities are equal. The probability of landing on the open end is greater. The probability of landing on the closed end is greater. No conclusion can be made.
anonymous
  • anonymous
@jim_thompson5910
jim_thompson5910
  • jim_thompson5910
this was for a different problem
anonymous
  • anonymous
opps let me send the actual chocies
anonymous
  • anonymous
15 over 20 11 over 20 6 over 20 5 over 20
jim_thompson5910
  • jim_thompson5910
so it looks like they didn't reduce the fraction, which is odd
jim_thompson5910
  • jim_thompson5910
so just don't reduce 5/20
anonymous
  • anonymous
kk

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