The probability that project A will succeed is 60%, that project B will succeed is 25%, and that project C will fail is 80%. Find the probability that all 3 of the projects fail.

Question

amistre64 · Answer

lag lag lag lag lag ....

what are their filure probs?

anonymous · Answer

Failure probs A = 40% B=25% C=80%

amistre64 · Answer

B fail is 75%

anonymous · Answer

Your right sorry

amistre64 · Answer

P(A n B n C)  is just multiplication of the probs .. right?

anonymous · Answer

Oh okay I think so, let me calculate one sec

anonymous · Answer

what sign is the n?

amistre64 · Answer

'and'  its just convenient since its shaped like an upside down u, and 'n' is in 'and'

amistre64 · Answer

assuming A B and C are equally likely to be chosen, we get a table such that complete failure is this attached in a drawing since i cant do anything with this lag ...

amistre64 · Answer

never mind the table i did, im sure its wrong to organize it that way

amistre64 · Answer

P(AnBnC) = P(A) * P(B) * P(C)

anonymous · Answer

Okay, I got 24%

amistre64 · Answer

me too

amistre64 · Answer

id make a list but typing isnt that great at the moment

anonymous · Answer

Thats alright, thanks a ton!

amistre64 · Answer

a=.60 ; a'=.40
b=.25 ; b'=.75
c=.20 ; c'=.80


a b c = .03

a b c'= .12
a b'c = .09
a'b c = .02

a b'c'= .36
a'b c'= .08
a'b'c = .06

a'b'c'= .24
      ------- 
total =  1