math
posted by math test need help!!! plz asap .
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

math 
Anonymous
if you bet 9 on the green I bet 11 on the white
although the probability of green = 9/20
and the probability of white = 11/20
the ODDS of green are
9/20 / 11/20 = 9/11
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