"ran", not "ranned" [sic], is the correct singular third-person past tense of the verb "run." English spoken here, if you please.
Average what? Height -- don't know. Math test score -- don't know that either. Oh! you mean her average speed. Ok, in what units? meters per second? kilometers per hour? miles per minute? Angstroms per nanosecond?
Distance equals rate times time, so rate must equal distance divided by time. It is up to you to provide appropriate units. If you divide some quantity of meters by some quantity of seconds, you will get a rate in meters per second.
