Answered

C={1/3,1/6,1/12,1/15}

Sagot :

AnneCviz
Roster method for alphabet :
A = {r, s, t, u, v, w, x, y, z}

C = The set containing the reciprocals of 3, 6, 12 and 15.

(If that had 1/9, I would have answered the set containing the reciprocals of multiples of 3 between 0 and 16.)