How would you solve for w if it's v=one third lwh

I love these because you are reversing a formula you already know!

so you would have to isolate w, and since l,w, and h are all being multiplied by each other, divide by l and h. You now have v over lh = 1/3 times w so divide 1/3 now to get v over 1/3lh = w. Now, plug in v, l, and h to get your answer.

It is 2 out of 8 she will pick green and 3 out of 7 she will pick green but red and green would be 5 out of 5 so 50% chance