Mathematics, 20.09.2020 06:01, itsyaboiimikey15

Two balls are to be pulled from a vase that contains 7 red balls 9 green balls and 2 black balls. After the first ball Is drawn, it is not the replaced. What is the probability that two black balls are chosen from the vase?

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Two balls are to be pulled from a vase that contains 7 red balls 9 green balls and 2 black balls. Af...