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A survey of stock market investors revealed 30% of individual investors have used a discount account. In a random sample of nine individual investors, what is the probability that:a. Exactly 2 of the individual investors have used a discount broker?b. None of the 9 individual investors have used the discount broker?c. Two or three of the individual investors have used a discount broker?d. What is the mean for this distribution?e. What is the standard deviation for this distribution?


 

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