OG13 PS question, Please help

[sanaa.rizwan]

Seed mixture X is 40% ryegrass and 60% bluegrass by weight, seed mixture Y is 25% ryegrass and 75% fescue, If a mixture X & Y contains 30% ryegrass, what percent of the weight of the mixture is X

a.10%
b.33 1/3%
c.40%
d.50%
e.60 2/3%

[GMATGuruNY]

I posted a solution in the second half of my post here:

https://www.beatthegmat.com/ratios-fract ... 15365.html

[Lifetron]

Typical Alligation problem. Jus use that X method...

40 25
30
5 10

1:2 => Mixture X = 1/3 = 33.3%

Answer B !