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A coin is tossed 9 times, and at least 7 of the tosses were heads. How many different sequences of tosses could there have been?

 Mar 9, 2020
 #1
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There are C(9,7) = 36 are possible sequences.

 Mar 9, 2020
 #2
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That's incorrect. It's 46 because its at least 7. so it's (9C7)+(9C8)+(9C9) which equals 46.

Guest Mar 10, 2020

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