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A bag contains 4 red balls and 5 green balls. If 4 balls are taken from...

A bag contains 4 red balls and 5 green balls. If 4 balls are taken from the bag without replacement, find the probability that
i) 2 red balls and 2 green balls are chosen
ii) the first two balls are red and the second two balls are green
iii) the colors of the four balls alternate
Math   Statistics-And-Probability   
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