In a sample of 1100 U. S.​ adults, 213 think that most celebrities are good role models. Two U. S. Adults are selected from this sample without replacement. Complete parts​ (a) through​ (c).

a) 0.0374  , b)  0.6500  , c) 0.3500

Step-by-step explanation:

Pr (Both consider celebrities role models) = (213/1100) x (212/1099)

= 0.0374

Pr (None consider celebrities role models) = (887/1100) x (886/1099)

= 0.6500

Pr (atleast one consider celebrities role models) = 1 - Pr (None consider role models)

1 - 0.6500 = 0.3500

answer is 67%

step-by-step explanation:

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.