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Sorry wrong equation. Should read
25x x 40y + 50 x 50 =1150
50x x 50y +25 x 40 -1350

25x x40+50x50=1150
40y x 25 + 50 x 50 = 1350 I think Ive got the answer but can't remember how I got it x = 135 y = 46

I need to solve this but don't know where to start?
2nx70+50x110L=1150
40Lx110+50x70=1350

7/20 x 9/20 x 4/20 = 252/ 80000

20 tins of soup. 7 are tomato, 9 are potato, 4 are carot. 2 tins are chosen at rendom. What is the probability that they are both carrot?

Yes, but I needed to know how to work out the probability - I got 27/72 by adding or 40/512 by multiplying and I'm not sure with method is correct. Any ideas please?

What is the probability of getting an A B and a C in geography with homework grades of 2 A, 4 B and 2 C's, Maths 3A, 3 B and 2C's, and music 1 A, 2 B and 5C's