Medium
In a lottery,a person chooses six different natural numbers at random from $1$ to $20$. If these six numbers match the six numbers already fixed by the lottery committee,he wins the prize. What is the probability of winning the prize in the game? [Hint: The order of the numbers is not important.]
- A$\frac{1}{38760}$
- B$\frac{1}{19380}$
- C$\frac{1}{77520}$
- D$\frac{6}{38760}$
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