Answer:
Therefore the chance that a particular square inch is not by any drops during a given 10 second period is .
Step-by-step explanation:
Poisson distribution:
Given that rain is falling at an average rate 30 drops per square inches per minutes.
A reasonable choose of this distribution is Poisson distribution .
Let the area be a square inch.
Here = average rate of rain drop × area
=(30×a)= 30 a
t = 10 second
.
Therefore,
Therefore the chance that a particular square inch is not by any drops during a given 10 second period is .