1) The mean score of an Insurance Commission Licensure Examination is 75, with a standard deviation of 5. What percentage of the data set lies between 50 and 100? [5]

2) A fair coin is flipped twice and X is the random variable representing the number of heads obtained.

Tabulate the probability distribution of X. [5]

3) The discrete random variable X has the following probability distribution.

X 3 P(X=X) 0.3 p 0.2 C