When a power surge occurs on an electrical line, it can damage a computer without a surge
Question:
When a power surge occurs on an electrical line, it can damage a computer without a surge protector. There are three types of surges: surges occur at rate 8 per day and damage a computer with probability 0.001; "medium" surges occur at rate I per day and will damage a computer with probability 0.01: "large" surges occur at rate I per month and damage a computer with probability 0.1. Assume that months are 30 days.
(a) What is the expected number of power surges per month?
(b) What is the expected number of computer damaging power surges per month?
(c) What is the probability a computer will not be damaged in I month?
(d) What is the probability that the first computer damaging surge is a small one?
Intermediate Accounting
ISBN: 978-0324300987
10th Edition
Authors: Loren A Nikolai, D. Bazley and Jefferson P. Jones