Exam Question

[smithy16]

Does anyone know what question 8 and Question 9 of the Matrices section in the 2010 VCAA Exam 1 (Multiple Choice)?


Question 8
m and n are positive whole numbers.
Matrix P is of order m × n.
Matrix Q is of order n × m.
The matrix products PQ and QP are both defined
A. for no values of m and n.
B. when m is equal to n only.
C. when m is greater than n only.
D. when m is less than n only.
E. for all values of m and n.

[dicknob]

no matter what order you put them in, the columns of the first matrix will match the rows of the second therefore E. all values of m and n are defined