In a sample of 800 U. S. adults, 219 think that most celebrities are good role models. Two U. S. adults are selected from this sample without replacement.

Question

Mathematics

Justice Matthews

19 August, 07:56

In a sample of 800 U. S. adults, 219 think that most celebrities are good role models. Two U. S. adults are selected from this sample without replacement.

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Answers (1)

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Belen · Answer 1

Step-by-step explanation:

A.

P = (219/800) * (218/799) ≈0.0747≈0.075

B.

800-219=581

P = (581/800) * (580/799) ≈0.527

c.

P (1 think role models and one thinks not role models) + P (both thinks they are role models) = (219/800) * (581/799) + (219/800) * (218/799) = (219*581+219*218) / (800*799)

=[219 (581+218) ] / (800*799)

= (219*799) / (800*799)

=219/800

=0.27375

=0.274