Mixing two methanol-water solutions of different concentrations

[yoleven]

Homework Statement

Two methanol-water mixtures are contained in separate flasks. The first mixture contains 40wt% methanol and the second contains 70wt% methanol. If 200g of the first mixture is combined with 150g of the second, what are the mass and composition of the product?

Homework Equations

The Attempt at a Solution

the first solution .4*200=80
the second .7*150=105
80+105=350x
x=52.9%wt methanol
amount is 150+200=350g

 

[Dick]

That seems fine. What's the problem?

 

[yoleven]

No problem. I just wanted to check it.
Sorry, I should have said that.
Thanks.