Goldman Limited has 5 Senior Managing Directors and 6 Managing Directors. Each investment banking deal requires the guidance of four managing directors, at least one of which must be a Senior Managing Director. How many possible investment banking deals can Morgan Limited possibly provide guidance for? Choose the correct choice from the following options
A) 116  B) 236  C) 315  D) 514  E) 614
P(at least 1 S D) = P(Total) - P(0 Senior Director)   =113154 - 63154   = 315
<result>C</result>
Goldman Limited has 5 Senior Managing Directors and 6 Managing Directors. Each investment banking deal requires the guidance of four managing directors, at least one of which must be a Senior Managing Director. How many possible investment banking deals can Morgan Limited possibly provide guidance for?