If 0.60: x : : 6 : 4, then x is equal to  Choices
A) 0.1 B) 0.4 C) 0.82 D) 0.8 E) none

Rationale: "sol . ( x × 6 ) = ( 0.60 × 4 ) ⇒ x = 2.4 / 6 = 0.40 . answer b"
Answer: B