What is the chord structure of the blues? Answer correct and I will make you brainliest and no links, in English plz

The 12-Bar Blues Chords

The standard 12-bar blues is a I-IV-V chord progression most typically divided into three four-bar segments. Blues progressions are almost exclusively played in 4/4 time and dominated by the root (I Chord), with the IV and V chords providing that extra bit of flavor to keep things interesting.

Explanation:

c a wide range of indigenous instruments

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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.