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babymother [125]
2 years ago
12

. Find the probability that the coin turns up heads for the first time on the tenth, eleventh, or twelfth toss.

Mathematics
1 answer:
Degger [83]2 years ago
3 0

Answer:

0.001709

Step-by-step explanation:

The probability of getting 9 tails then 1 head is:

(½)⁹ (½)¹ = (½)¹⁰

The probability of getting 10 tails then 1 head is:

(½)¹⁰ (½)¹ = (½)¹¹

The probability of getting 11 tails then 1 head is:

(½)¹¹ (½)¹ = (½)¹²

The total probability is:

(½)¹⁰ + (½)¹¹ + (½)¹²

0.001709

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