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A cheese can be classified as either raw dash milk or pasteurized. Suppose that 91​% of cheeses are classified as pasteurized. ​(a) Two cheeses are chosen at random. What is the probability that both cheeses are pasteurized​? ​(b) Six cheeses are chosen at random. What is the probability that all six cheeses are pasteurized​? ​(c) What is the probability that at least one of six randomly selected cheeses is raw dash milk​? Would it be unusual that at least one of six randomly selected cheeses is raw dash milk​?

Respuesta :

Answer:

Step-by-step explanation:

Given that a cheese can be classified as either raw dash milk or pasteurized. Suppose that 91​% of cheeses are classified as pasteurized.

Each cheese is independent of the other and there are only two outcomes.

Hence X = no of cheeses pasteurized is binomial (2,0.91)

a) P(x=2 ) when n=2  is[tex](0.91)^2=0.8281[/tex]

b) n=6.  

P(x=6) = [tex](0.91)^6=0.5679[/tex]

c) P(atleast one raw dash milk) = 1-P(all pasteurised)

=0.8281

Since probability is 0.83 it is not unusual.

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