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--- binomial_distribution [2020/11/27 19:40] – hkimscil
+++ binomial_distribution [2020/11/27 19:42] (current) – hkimscil
@@ Line 19: / Line 19: @@
 일반적으로 binomial distribution은 아래와 같이 계산된다.
-\begin{eqnarray*}
+\begin{align*}
-P(X=x) = _{n}C_{x} \cdot p^{x} \cdot (1-p)^{n-x}, \;\; \text{for} \;\; x = 0, 1, 2, . . ., n. \\
+P(X=x) & = _{n}C_{x} \cdot p^{x} \cdot (1-p)^{n-x}, \;\; \text{for} \;\; x = 0, 1, 2, . . ., n. \\
-\end{eqnarray*}
+\text{or } & \\
+P(X=x) & = {{n} \choose {x}} \cdot p^{x} \cdot (1-p)^{n-x}, \;\; \text{for} \;\; x = 0, 1, 2, . . ., n. \\
+\end{align*}
 A balanced dice is rolled 3 times. What is probability a 5 comes up exactly twice?