Respuesta :

sqdancefan

Answer:

the third choice (shown below)

Explanation:

"At most 1" means "0 or 1." So the probability that at most 1 person is cured is the probability that 0 are cured added to the probability that 1 is cured.

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janlee113

Answer:

The third choice shown below...

(20) (0.80)²ⁿ+(20) (0.20)¹(0.80)^19

( 0). ( 1)

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