exam Maths Puzzle Numerical Ability

A jar contains 13 black and 12 red marbles. If one marble is drawn at random, what is the probability that it is black?

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exam Other Question

How do you write 10.9 in Roman Numerals? I know how to write the 10, but am unsure of how the decimals are done. Solve and graph the solution set. 3(x-4)>7x-9. I do not know to solve this problem at all. Your help will be greatly appreciated thank you so much and God bless you to continue helping all of us.