Question

Inclusions are defects in poured metal caused by contaminants. The number of (large) inclusions in cast iron follows a Poisson distribution with a rate of 3.4 per cubic millimetre. What is the probability of at least one inclusion in a cubic millimetre? Please enter the answer to 3 decimal places.

Step 1

According to the question, the inclusions follow Poisson distribution which is given by:

Step 2

Where *T* is the volume of material to inspect,

Now, it is given that the number of inclusions in cast iron follows a Poisson distribution with a rate of 3.4 per cubic millimetre.

So, here

Step 3

Therefore, the probability of at least one inclusi...

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