re.com/courses/2924907/assignments/26502447 The following table represents the number of free throws a typical NBA player makes in three attempts. Free Throws Made |0 1 2 3 Probability 0.1 0.3 0.2 What is the probability needed in order to make this a valid probability distribution? O 0.5 O 0.3 01 Oo None of the above What is the mean of this distribution? 0.25 1.5 0.2 0 1.9 ONone of the above What unit of measurement does the standard deviation have? Square root of free throws Free throws squared Free throws No unit of measurement O a W hp