# Heads I win, Tails you lose

John has 3 unique coins such that the probability of obtaining a head when the coin is flipped is $$\frac{1}{10}$$, $$\frac{2}{10}$$ and $$\frac{3}{10}$$, respectively. If he flips each of the 3 coins once, the probability that at least 1 heads appears is $$p$$. What is the value of $$1000p$$?

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