A computer system has three independent back-up batteries
MATHEMATICS · Single correct · A Level · Mathematics · Probability · Probability
Problem
A computer system has three independent back-up batteries. Each battery works during a power cut with probability 0.95, 0.90 and 0.85 respectively. Find the probability that all three batteries work during a power cut.
(a) 0.90000
(b) 0.72675
(c) 0.70000
(d) 0.85500