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In page Alex Van Halen:

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In 1971, Van Halen graduated from Pasadena High School in California.[4] He then took classes in music theory, scoring, composition and arranging at Pasadena City College for a short while.[4] While attending Pasadena City College, Alex met Michael Anthony and David Lee Roth. They formed the band Mammoth, and Alex, along with the others, left Pasadena City College.[10]