I have a homework problem that I am not sure I am answering correctly
750 workers were surveyed about where they had attended school. 480 of the workers surveyed had attended a community college. 420 of the workers surveyed had attended a 4 year school. 75 of the workers surveyed had attended neither.
a) find the probability that a student attended a community college or attended a university
b) find the probability that a student did not attend a community college or did not attend a university.
1
Expert's answer
2012-05-18T11:38:02-0400
a) find the probability that a student attended a community college or attended a university The number of workers attended a community college or attended a university: 750 - 75 = 675 So, the probability is P = 675 / 750 = 90% b) find the probability that a student did not attend a community college or did not attend a university. The number of workers attended either a community college and a university: 420 - x + 480 = 675 x = 225 So, the number of workers did not attended a community college or did not attend a university is 750 - 225 = 475 And the probability is P = 475 / 750 = approx. 63%
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