*** Calculate the percentage of 5x5 binary matrices with det = 0 ***
>> A = rand(5)

A =

    0.2644    0.0438    0.2038    0.5057    0.6141
    0.2064    0.0061    0.2342    0.0610    0.3391
    0.9322    0.8171    0.8985    0.1353    0.6857
    0.3933    0.9152    0.7878    0.0222    0.2174
    0.0624    0.7416    0.1830    0.8698    0.2314

>> A = round(rand(5))

A =

     0     1     0     1     0
     0     1     1     0     0
     0     1     0     1     1
     1     0     0     1     0
     0     1     0     0     0

>> c = 0

c =

     0

>> for j=1:1000
A = round(rand(5));
if (det(A)==0)
    c = c + 1;
end
end
>> c

c =

   630

>> c = 0;
>> for j=1:10000
A = round(rand(5));
if (det(A)==0)
    c = c + 1;
end
end
>> c

c =

        6285