60% of Americans said they owned a phone. if 45 Americans are randomly selected, what is...

Question

Question

60% of Americans said they owned a phone. if 45 Americans are randomly selected, what is the probability that 25 of them would own a phone?

math Statistics-And-Probability

Answer 1

Answer #1

Let X is a random variable takes value 1 when a person owns a phone, 0 if not.

Then,

P ( X = 1 ) = 0.6 and P( X = 0) = 0.4

X follows ber( 0.6)

Let,

Then , Y follows Bin( 45, 0.6 )

Answer 2

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