Question

each sample of water has a 10 chance of containing a particular organic pollutant.assume that the sample are independent with regards to the present of the pollutant. find the probability that in the next 18 sample at least 4 sample contain the pollutant​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

p= 0.10

q= 1-p

= 1-0.10

= 0.90

n=18

by using binomial distribution formula

P= 18c4 × (0.10)^4 × (0.90)^18-4

by solving this equation

P= 0.0700