Answer:
[tex]P(B | A)=0.4=40\%[/tex]
Step-by-step explanation:
Call A to the event in which there are electrical storms.
Call B the event in which there is hail.
Then, by definition.
The Probability of B given A is:
[tex]P(B | A)=\frac{P(B\ and\ A)}{P(A)}[/tex]
We know that:
[tex]P(B\ and\ A)= 10\%=0.1\\\\P(A) = 25\%=0.25[/tex]
Therefore
[tex]P(B | A)=\frac{0.1}{0.25}[/tex]
[tex]P(B | A)=0.4=40\%[/tex]
