Bass Pentatonic Scale

     The pentatonic scale consists of 5 notes which are 1(root, 2nd, 3rd, 5th, and 6th for major scale and 1, b3, 4, 5, b7 for minor scale. 

So if the root is C Major then the whole pentatonic scale will be:

C, D, E, G, A

If it's the minor pentatonic scale, then the whole scale will be:

C, Eb, F, G, Bb