Some of 60%-intensity red paint is replaced with 30% solution of red paint such that the new paint intensity is 40%. What fraction of the original paint was replaced?	Choose the correct choice from the following choices:
A) 2/3	B) 1/3	C) 2/5	D) 1/2	E) 1/5
Let total paint = 1   Let amount replaced = x   60 (1-x) + 30x = 40   x = 2/3   2/3NSWER:2/3
<result>A</result>
Some of 60%-intensity red paint is replaced with 30% solution of red paint such that the new paint intensity is 40%. What fraction of the original paint was replaced?