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7 December, 22:23

Data collected at elementary schools in DeKalb County, GA suggest that each year roughly 25% of students miss exactly one day of school, 15% miss 2 days, and 28% miss 3 or more days due to sickness. (a) What is the probability that a student chosen at random doesnt miss any days of school due to sickness this year? (b) What is the probability that a student chosen at random misses no more than one day? (c) What is the probability that a student chosen at random misses at least one day?

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  1. 7 December, 22:29
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    A) 1 - (.25+.15+.28) =.32 or 32%

    B) 1 - (.15+.28) =.57 or 57%

    C).25+.15+.28 =.68 or 68%
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