Final answer:
The total magnification when viewing a specimen with a 20x objective lens and a 10x ocular lens is 200x, which means the specimen appears 200 times larger than its actual size.
Step-by-step explanation:
If a specimen was being viewed using a 20x objective lens and a 10x ocular lens, the total magnification would be calculated by multiplying the magnifications of the two lenses together. Therefore, the total magnification would be (20x) × (10x) = 200x. This means that the specimen would appear 200 times larger than its actual size when viewed through the microscope.