The probability that a battery will last 10 hr or more is 0.8, and the probability that it will last 15 hr or more is 0.14. Given that a battery has lasted 10 hr, find the probability that it will last 15 hr or more.

Question

anonymous · Answer

Probability (A given B)
      Prob (A and B)
= ----------------
          Prob (B)
A = probability battery will last 10hrs or more
B = probability battery will last 15hrs or more
What is Prob (A and B) ? That is the probability the battery last 10hrs or more AND lasts 15 hrs or more.

anonymous · Answer

B is actually a subset of A on this one. So Pr(A and B) = Pr(B) = 0.14

anonymous · Answer

its wrong actually

anonymous · Answer

i didn't finish it... if you actually understood what i wrote. I did most of it, but I left the remainder for you to do.
People don't (or shouldn't) work out problems for you.
Where did you go? Don't just post and leave?
Interact with those trying to help

anonymous · Answer

am with u , i just to understand it clearly

anonymous · Answer

want*