% 
% 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.
% 
%-----

% Part (a): 
%
% compute "lambda": 
lambda = 10*0.5^2 - 10*0.25^2

% compute the probability: 
prob = 1 - poisspdf( 0, lambda ) - poisspdf( 1, lambda ) 
 
% Part (b): 
%
% compute "lambda": 
lambda = 10*0.25^2

% compute the probability: 
prob = 1 - poisspdf( 0, lambda ) - poisspdf( 1, lambda )