Which algebraic equation represents the following scenario?
Ms. Cosby had 6 students in her room, and then an addition one-fifth of the 7th grade students. There here 25 students in her room in total.
A.
6.2x = 25

B.
6 + 0.2x = 25

C.
6 + 1.5x = 25

D.
(6 + x)0.2 =25