A"mystery shopper" is an anonymous person whose purpose is to enter a store and record how he or she was treated by the staff. the mystery shopper then reports findings to the management. which of the following best describes a mystery shopper?

a. covert and structured
b. covert and unstructured
c. overt and structured
d. overt and unstructured

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

3/20

step-by-step explanation:

well, there are 20 outcomes, and 3 of them you want. so, 3/20