Mathematics, 21.02.2020 06:14 mepuppy5000

X, Y and Z represent 20%, 30% and 50% 2%, 3% and 5% of students from X, Y and z (respectively) participate in these competitions every year. What is the probability that a randomly selected student participates at annual math competition and belongs to high school X.

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X, Y and Z represent 20%, 30% and 50% 2%, 3% and 5% of students from X, Y and z (respectively) parti...