The probability P, as a percent, that a certain computer keyboard in a public library will last more than t years can be approximated by P = 100e−1.2t. (a) What is the probability that the keyboard will last more than 2 years? Round to the nearest tenth. (b) After how many years will the probability of keyboard failure be 94%? Round to the nearest tenth.

The probability P, as a percent, that a certain computer keyboard in a public library will last more than t years can be approximated by P = 100e−1.2t. (a) What is the probability that the keyboard will last more than 2 years? Round to the nearest tenth. (b) After how many years will the probability of keyboard failure be 94%? Round to the nearest tenth.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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