1 - (7! / (0! × 7!) × (1/3)^0 × (2/3)^7 + 7! / (1! × 6!) × (1/3)^1 × (2/3)^6)1 - (7! / (0! × 7!) × (1/3)^0 × (2/3)^7 + 7! / (1! × 6!) × (1/3)^1 × (2/3)^6)

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