a |
b |
c |
d |
e |

f |
g |
h |
i |
j |

k |
l |
m |
n |
o |

p |
q |
r |
s |
t |

u |
v |
w |
x |
y |

Here, **agmsy** is one elementary product. Similarly, **agmtx, fbmsy** are elementary products as they contain exactly one entry from each row and each column. So, We can say that for any n x n matrix there will be elementary products.

Elementry product will have 5 elements. For first element we have 5 choices (any of the elements from first column) then for second element we have 4 choices (we can't take the value from the row that first element of the product comes) and so on. Hence,