The mean LSAT score for Philosophy majors is the fifth highest for all humanities and social science majors. The following information is for tests administered from 1991-1996. Outside of the hard sciences, Philosophy has had either the first or second highest mean score on the GMAT each year. Including the hard sciences, the mean GMAT score for Philosophy majors is fourth or fifth highest of all majors. And you will learn things that will be useful no matter what you do.
Skills gained by philosophy majors are useful in almost any career.
The ability to think logically. The ability to analyze and solve problems. The ability to assess to pros and cons of proposed solutions. The ability to write and speak clearly, attending to details. The ability to ask the right questions.