A Wall Street journat survey found that 30% of individual inestors have used a discount broker, In a random sample of 9 individuals, what is the probability that: a. exactly 2 of the sampled indiduals hane used a divcount broken? b. that of of the sempled indiviluats ustd a discoum breker? c. That one or more sampled indwiduals used a discount broken? A Wall Street journat survey found that 30% of individual inestors have used a discount broker, In a random sample of 9 individuals, what is the probability that: a. exactly 2 of the sampled indiduals hane used a divcount broken? b. that of of the sempled indiviluats ustd a discoum breker? c. That one or more sampled indwiduals used a discount broken