7. A bag contains 3 white , 4 red and 5 black balls. What is the probability of getting
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1/3 is the answer of 1st ans 3rd and 2/3 is the answer of 2nd
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Answer:
red balls = 4/12 = 1/3
neither white nor red = 5/12
black or white = 8/12 = 2/3
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