Examples of use
        In major keys, major chords are found on the I, IV and V (1st, 4th and 5th) degrees of the scale. 
In G major, that means G, C and D. These three chords form the basis of a huge number of popular songs.
        
        
  
        
        
        In a minor key, a major chord is found on the III, V and VI (3rd, 5th and 6th) degrees of the scale. 
For example, in C minor, there are major chords on Eb, Ab and G