Question

A 200 pages book has 0.4 mistakes per page on an average find the probability that a randomly selected page from the book is free from mistakes in the book how many pages contain mistake​

Answer 1

Answer:

Sorry l dont know the answer.

Answer 2

Explanation:

suspect the Poisson distribution comes into play here.

The probability of finding k errors on a page of a book is Pr[X=k]=e−λλkk!.

Given Pr[X=0]=e−4 , thus λ=4 . So, the probability of finding 2 errors on a page of a book is Pr[X=2]=8e−4.

More insight on λ : It can be interpreted as an error rate in a book. For example, 4000 errors per 1000 pages gives rise to λ being 4 .

Again, for more insight one could read on the Poisson distribution.