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[" 67.A problem is given to "3" students...

[" 67.A problem is given to "3" students.Their chances "],[" of solving it individually are "(1)/(3),(1)/(4)" and "(1)/(5)" .The "],[" probability that the problem will be solved is "],[[" 1) "(2)/(5)," 2) "(3)/(5)," 3) "(4)/(5)," 4) "(1)/(5)]]

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