A bag contains 9 green marbles and 11 white marbles. You select a marble at random. What are the odds in favor of picking a green marble?

A. 9:20
B. 2:9
C. 11:9
D. 9:11***?

8 answers

prob(green) = 9/20
prob(not green) = 11/20

odds in favour of green = (9/20) : (11/20)
= 9: 11

you are correct.
thank you!
Correct!
you are correct.
why did it have to be 911
just cuz why not
wait 911???
what?
9 / 11 / 2001 is what @answers was referring to. (The time when the twin towers was hit and destroyed)

911 is also the USA hotline for help in serious situations. They can bring you an ambulance, police officers, animal control, etc.