are three colms in a Is a On, anotner is a fair Colm, a nd the third 1S a ased coin that comes up heads 80% of the time. a) When one of these coins were selected at random and flipped, what is the probability that it shows heads? b) A coin is selected randomly and is flipped. If X is a random variable that shows the number of heads, what is expected value of X? c) All three coins are flipped. If X is a random variable that shows the number of heads, what is expected value of X?

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