exam Maths Puzzle Numerical Ability

I have to graph this and I am not sure how?
Graph the solution set of x > 3.

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Not sure if this is right

7. (2 pts)
Two balls are to be selected without replacement from a bag containing one red, one blue, one green, one yellow, and one black ball. How many points are there in the sample space? 5*4 = 20 ?? Please help me explain set-up of equation:
1. A business invests $10,000 in a savings account for two years. At the beginning of the second year, an additional $3500 is invested.