exam Maths Puzzle Numerical Ability

a bag contains 5 red, 6 black, 4 blue, and 3 yellow marbles. Find the probabilty of selecting the following without replacement. Choosing two black marbles?

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hello

solve by graphing to show independent, inconsistent or dependent:

2x - 3y = 12
3y - 2x = -12

tks! three numbers are such that the second is two less than three times the first and the third is four times the first. the sum of the three numbers is 38. find the largest and smallest numbers?