function res = chap_9_prob_3_lambda(n,M,lambda)
% CHAP_9_PROB_3_LAMBDA - 
% 
% Written by:
% -- 
% John L. Weatherwax                2007-09-10
% 
% email: wax@alum.mit.edu
% 
% Please send comments and especially bug reports to the
% above email address.
% 
%-----

res = lambda*(M-n); 

return;