SOLUTION: Find the probability of winning second prize - that is, picking 6 of the 7 winning numbers - with a 7/30 lottery.

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Question 1051216: Find the probability of winning second prize - that is, picking 6 of the 7 winning numbers - with a 7/30 lottery.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
30 numbers total, 7 correct numbers.
Total possible outcomes
N=n%21%2F%28r%21%28n-r%29%21%29=30%21%2F%287%21%2823%29%21%29=2035800
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There are 7 possible outcomes that have 6 correct answers.
So,
P=7%2F2035800