In testing a new medication, researchers found that 15% of all patients using it will have a mild side effect. A random sample of 25 patients using the medication is selected. Find the probability that more than 5 patients will have this mild side effect.

The probability that more than 5 patients will have this mild side effect is ___. (Round to three decimal places as needed.)


Answer:
Given:

Probability of success $(p)=0.15$

Sample size $(n)=25$

Solution:
The probability that more than 5 patients will have this mild side effect:
$\text{P}(x > 5) = \sum_{6}^{25} \binom{n}{x} \cdot p^x \cdot (1-p)^{n-x} = \sum_{6}^{25} \binom{25}{x} \cdot 0.15^x \cdot (1-0.15)^{25-x} = 0.1615$

Final Answer:
The probability that more than 5 patients will have this mild side effect $=0.1615$

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