What is the magnification power of ocular lense 20x by objective lense 15x?

The total magnification power of a microscope is calculated by multiplying the magnification of the ocular lens by that of the objective lens. In this case, with an ocular lens of 20x and an objective lens of 15x, the total magnification would be 20x * 15x = 300x. Thus, the total magnification power is 300 times the actual size of the specimen.