114 Cell phone handoff behavior. The Journal of Engineering, Computing and Architecture (Vol. 3., 2009) did a study of cell phone handoff behavior. Recall that a “handoff”

describes the process of a cell phone moving from one base channel (identified by a color code) to another. During a particular driving trip a cell phone changed channels (color codes) 85 times. Color code “b” was accessed 40 times on the trip. You randomly select 7 of the 85 handoffs. How likely is it that the cell phone accesses color code “b” only twice for these 7 handoffs?