Final answer:
The total magnification of the low power objective lens is 50x.
Step-by-step explanation:
The total magnification of a microscope is determined by multiplying the magnification of the objective lens by the magnification of the eyepiece. In this case, the low power objective lens has a magnification of 10x and the eyepiece has a magnification of 5x. Therefore, the total magnification of the low power is 10x × 5x = 50x.