A 3\times3 grid is filled with the digits 1,2 and 3 so that each number appears once in in each row and column. Two different examples are 
and 
How many different ways are there of filling the grid?
Answer Choices
A. 42
B. 12
C. 10
D. 8
E. 6
A 3\times3 grid is filled with the digits 1,2 and 3 so that each number appears once in in each row and column. Two different examples are and
How many different ways are there of filling the grid?
Answer Choices
A. 42
B. 12
C. 10
D. 8
E. 6