View Full Version : Finding the Probability

04-02-2010, 02:01 PM
Hi I just have a quick question, and just want to know if I did the question right :)
A organization contains 2 events, E and T. The organization will function as long as either E or T functions. The probability that E functions is 0.95, the probability that T functions is 0.90, and the probability that both function is 0.85. What is the probability that the organization functions?
So, here is what I got.
P(EUT) = P(E) + P(T) - P(E and T)
= 0.95 + 0.90 - 0.85
= 1
So, the probability is one.
Is that correct?

04-02-2010, 02:09 PM
looks fine to me