Mathematics, 02.03.2020 22:58 lrasanaoaksandfurana
Twenty-six biased coins are flipped once. The coins are weighted so that the probability of a head with any coin is 0.3. What is the probability of getting at least 15 heads
Answers: 1
![=1-\sum_{x=0}^{x=14} P (X=x)\\=1-\sum_{x=0}^{x=14} [{26\choose x}(0.30)^{x}(1-0.30)^{26-x}]\\=1-0.9970\\=0.0030](/tpl/images/0530/9550/8cbdc.png)
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