exam Maths Puzzle Numerical Ability

A bag contains 4 red, 6 white, and 9 blue marbles. How many ways can 5 marbles be selected if 2 are one color, and 3 are another?

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the circumference of the great wheel was twelve thousand and forty-one thousandths inches. The circumference of the lesser wheel was only one thousand, twenty-one and two hundred-thousandths inches. How much larger was the great wheel? Could someone help me with the following: Find three ordered pairs and graph the following equation. x - 2y = 4 Thanks Alot