There are 24 major keys possible in the family of diatonic key signatures. a)true b)false

B)False

C D E F G A and B Major - that’s 7

C# D# F# G# and A# Major (you can also rename it as Db Eb Gb and Bb respectively) - that’s 5

7 + 5 = 12. 12 different major key scales

It depends on what type of third separates the three notes.for example: if you have two mayor thirds is an "aumented chord"if you have two minor thirds is an "diminued chord"if you have one mayor first and then one minor is a "mayor chord"and inverted is a "minor chord"