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**Experimental probability **is the ratio of the proposed outcome to the number of experimental trials.

\begin{align*}P(success)= \frac{number \ of \ times \ the \ event \ occured}{total \ number \ of \ trials \ of \ experiment}\end{align*}

List three ways to express probability: _____________________________________________

What are compound events? ________________________________________________

What is the difference between **independent** and **dependent** events?

______________________________________________________________________

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**Independent Events:**

**\begin{align*}P(A \ and \ B)=P(A) \cdot P(B)\end{align*} P(A and B)=P(A)⋅P(B)**

**Dependent Events:**

**\begin{align*}P(A \ and \ B)=P(A) \cdot P(B \ following \ A)\end{align*} P(A and B)=P(A)⋅P(B following A)**

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What does it mean if two events are **mutually exclusive**? ________________________________________________________________

To find the probability of one or the other mutually exclusive or inclusive event, add the individual probabilities and subtract the probability they occur at the same time.

\begin{align*}P(A \ or \ B)=P(A)+P(B)-P(A \cap B)\end{align*}

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Click here for more on the probability of compound events.