exam Maths Puzzle Numerical Ability

I'm actually having problems with probability questions that involve fractions in it.I have a couple of questions and thank you to whoever helps me.The first one is,A bag contains

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exam Other Question

solve: (2c^2-8/4c^2-8c)(c^2+2c^2)/8c^3 determine the correct half-plane in each case and complete the graph
4x+y>4 (the symbol > has an underline)