in a box there are 9 red balls 5 white balls and 4 green balls. if a ball is selected at random. what is the probability of getting a red ball
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18 by 9 is the probability
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total number of bolls = 9+5+4=18
total posible numbers = 18
total favourable outcome = 9
p(of getting red boll ) = 18/9 = 2
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