use the following information to answer question (6) and (7): The Alex Convention Centre has a seating capacity of 500 people and will be used to host the 2017 Annual Golden Key Conference and Gala Dinner. The event will be free for all its members. Generally, 90% of members that attend the Conference also attend the Gala Dinner that follows in the evening. Based on past conferences, attendance of members has been uncertain but from experience, attendance is expected to be as follows: Probability of attending Conference Gala Dinner 2% 500 450 25% 400 360 33% 350 315 40% 300 270 If the expected attendance for the conference is 345.5, calculate the variance of conference attendance? 40.80 45.33 2 054.75 1 644.35