Suppose 3 students are selected from a group of 18 students to form a team. How many ways can this team be formed if one of the team members will be assigned the role of team leader. Answer:Suppose X is a discrete random variable with the following discrete probability distribution. X 2 4 5 P(X) 10.3 0.5 0.2 Find the mean of the random variable X. Correct your answer to 1 decimal place. Answer:Find the standard deviation of the following discrete probability distribution. Correct your answer to 1 decimal place. X 3 5 8 P(X) 0.3 0.4 0.3 It is known that the mean of random variable X is 5.3. Answer:Suppose X is a discrete random variable with the following discrete probability distribution. X 2 4 7 P(X) |0.24 0.27 K Find the unknown K in the discrete probability distribution