The average annual salaries of government employees at all levels can be regarded as this (these) type (s) of mathematical concepts) and type(s) /
Die gemiddelde jaarlikse salarisse van staatsamptenare op alle vlakke kan beskou word as hierdie tipe(s) wiskundige konsept(e) en tipe(s)
A. Constant rates /
B. Single unit measures /
C. Unit rates /
D. Proportions /
E. Exchange rates /
F. Average rates /