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Set Theoryeasy
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Let C1={red, yellow, blue}C_1 = \{\text{red, yellow, blue}\}C1​={red, yellow, blue} be the set of primary colors, and C2={orange, green, purple, red, yellow}C_2 = \{\text{orange, green, purple, red, yellow}\}C2​={orange, green, purple, red, yellow} be a set of colors used in a painting. What is the set difference C1∖C2C_1 \setminus C_2C1​∖C2​?