Hello, zorro!

A system is made up of three components that operate independently from one another.

For the system to work, at least two components must work.

Suppose that: .

(a) What is the probability that the system works?

(b) Given that the system works, what is the probability that exactly two components work?

Numerator: .Exactly 2 components work:

. .

Denominator, from (a): .

Therefore: .

Ihopethis one is correct . . .

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