Medieval music began in about what year?
a. 4000 bceb.1 cec.500 ced.1600 ce

including the octave, the answer would 8 notes in a major scale with one note being played twice. ex) c major scale includes: c, d, e, f, g, a, b, c

notice that c is played twice

however, if you were to ask me how many different notes are in a major scale- the answer would be 7.  

oranienbaum, russia.

the answer is backup

i think eddy chen is better.