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# An American Society of Investors survey found 30 percent of individual investors have used a discount broker. In a random sample of nine individuals,...

An American Society of Investors survey found 30 percent of individual investors have used a discount broker. In a random sample of nine individuals, what is the probability for the following? (a) Exactly two of the sampled individuals have used a discount broker? (Round your answer to 3 decimal places.) Probability (b) Exactly four of them have used a discount broker? (Round your answer to 3 decimal places.) Probability (c) None of them have used a discount broker?