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.

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