Apple Infotech has 4 Senior Managing Directors and 5 Managing Directors. Each investment banking deal requires the guidance of two managing directors, at least one of which must be a Senior Managing Director. How many possible investment banking deals can Apple Infotech possibly provide guidance for? Choose the correct choice from the following choices:
A) 16  B) 20  C) 26  D) 54  E) 64
P(at least 1 S D) = P(Total) - P(0 Senior Director)   =9262 - 5262   = 26
<result>C</result>
Apple Infotech has 4 Senior Managing Directors and 5 Managing Directors. Each investment banking deal requires the guidance of two managing directors, at least one of which must be a Senior Managing Director. How many possible investment banking deals can Apple Infotech possibly provide guidance for?