Croissant Bakery Inc. offers specially decorated cakes for birthdays, weddings, and other occasions. It also has regular cakes available in its display case. The following table gives the total number of cakes sold per day and the corresponding probability Compute the mean, variance, and standard deviation of the number of cakes sold per day. Probability Number of Cakes Sold in a Day 12 0.25 13 0.40 14 0.25 15 0.10