"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 doesn't 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?

Question

"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 doesn't 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?

anonymous · Answer

A) 1-(.25+.15+.28) = .32 or 32%

B) 1-(.15+.28) = .57 or 57%

C) .25+.15+.28 = .68 or 68%