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a) Since the probability of showing the letter A is and the probability of showing the letter B is the probability of showing the letter A or B is
the probability of showing the letter A or B is
b) The probability of not showing the letter C can be done in two ways. We can use the complement and state that
Alternatively, we can see that this is the same as showing a letter A or B and hence is the same as the answer to part a.
Дата публикования: 2014-11-03; Прочитано: 315 | Нарушение авторского права страницы | Мы поможем в написании вашей работы!