College

Suppose that [tex]$E$[/tex] and [tex]$F$[/tex] are two events and that [tex]$N(E \cap F) = 220$[/tex] and [tex]$N(E) = 580$[/tex]. What is [tex]$P(F \mid E)$[/tex]?

Answer :

Sure, let's go through the problem step-by-step to find the conditional probability [tex]\( P(F \mid E) \)[/tex].

Given:
- [tex]\( N(E \text{ and } F) = 220 \)[/tex]
- [tex]\( N(E) = 580 \)[/tex]

We are asked to find the conditional probability [tex]\( P(F \mid E) \)[/tex], which is defined as the probability of event [tex]\( F \)[/tex] occurring given that event [tex]\( E \)[/tex] has already occurred.

The formula for conditional probability is:
[tex]\[ P(F \mid E) = \frac{N(E \text{ and } F)}{N(E)} \][/tex]

Now, substituting the given values into the formula:
[tex]\[ P(F \mid E) = \frac{220}{580} \][/tex]

Evaluating this fraction gives:
[tex]\[ P(F \mid E) \approx 0.3793103448275862 \][/tex]

Therefore, the conditional probability [tex]\( P(F \mid E) \)[/tex] is approximately [tex]\( 0.3793 \)[/tex] or [tex]\( 37.93\% \)[/tex].

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