Question

Four milliliters of ink A is added to 10 milliliters of ink B, forming a mixture of inks. Ink A contains 10% blue pigment. Ink B contains an unknown percentage of blue pigment. The mixture of the two inks contains 35% blue pigment.

What percentage of blue pigment is in the mixture of the two inks?

45%
49%
60%
75%

Answer 1

Ans is 45%
Blue pigment in ink A = 4ml*(10/100)
Blue pigment in ink B = 10ml*(x/100)
Blue pigment in mixture = 14ml*(35/100)

Answer 2

The amount of Blue pigment is fixed
so 4*(10/100)+10*(x/100) = 14*(35/100)
x = 45