Originally Posted by

**shaselai** I am confused about a couple of questions.. hope you guys can help...

Failure rates of G,F,B

p(G) = .1

p(F) = .1 p(F) = .5 if G or B fails

p(B) = 0 p(B) = .5 if G fails Mr F says: This data does not make sense. Please re-check.

a. what is the probability that all three fail? I think it is just .1*.5*.5 = .025

b Given that more than one failed, determine the conditional probabilities that:

1. G did not fail.

Since G is independent is it just 1-.1 = .9?

2. B failed.

Not sure...

3. Both the G and F failed.

Not sure either.. B depends on G so B could fail too?

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