7) What must be the sum of the P(X) in the mean and variance of discrete random con variable? C. 100% D. 1 000% A. 1% В. 10% *For numbers 8- 10, use the data below. The number of boxes of face mask...

Extracted text: 7) What must be the sum of the P(X) in the mean and variance of discrete random con variable? C. 100% D. 1 000% A. 1% В. 10% *For numbers 8- 10, use the data below. The number of boxes of face mask being sold by a pharmacy per day are 5, 6, 7, 8, 9, and 10 along with the probabilities of 0.2, 0.1, 0.1, 0.1, 0.2, 0.3. 8) Based on the data given, more likely, how many boxes of face mask would the pharmacy sell per day? А. 5 В. 6 С.8 D. 10 9) What is the mean of the discrete random variable? A. 5.9 В. 6.9 С. 7.9 D.8.9 10) Which of the following statements best interpret the computed mean? A. The pharmacy would sell more or less 8 boxes of face mask per day. B. The pharmacy would sell8 boxes of face mask per day. C. The pharmacy would sell exactly 7 boxes of face mask per day. D. The pharmacy would sell more than 7 boxes of face mask per day.