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Problema Solution

a brand name has a 40% recognition rate. if the owner of the brand wants to verify that rate by beginning with a small sample of a 5 randomly selected consumers, find the probability that exactly 2 of the 5 consumers recognize the brand name. Also find the probability that the number who recognize the brand name is not 2

the probability that exactly 2 of the 5 conumers recognize the brand name is

the probability that the number who recognize the brand name is not 2 is

Solution:

2 out of 5, the rate is 2/5=40%

when there is none,  or 1, or 3, or 4 or, 5 the rate is 0,20%,80% 100%

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