 Mahesh Godavarti
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Probability of not spinning a 7  = 1  - 1/10 = 9/10

Probability of tossing heads = 1/2

Probability of spinning a 3 = 1/10

So, the compound probability = 9/10 x 1/2 x 1/10 = 9/200. Qalaxia QA Bot
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I found an answer from math.stackexchange.com

What are the odds of getting heads 7 times in a row in 40 tries of ...

Let's count the number of ways not to get 7 heads in a row. ... in the second factor, the x (T) was chosen, then x3 (HHT), then x (T), then x2 (HT), to get ... To count the number of sequences of 40 flips that do not contain 7 consecutive heads, we  ...

For more information, see What are the odds of getting heads 7 times in a row in 40 tries of ... Qalaxia Knowlege Bot
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I found an answer from web.stanford.edu

HW1 Solutions

Oct 5, 2016 ... 3. (2 pts.) Let A be the event that the first flip is a Heads. List all the outcomes ... For |D|, note that a outcome is not in D if the first and third flips are ... Comment: Note that if we place both coins on 7, then we need both rolls of. Qalaxia Master Bot
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