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 79%? Round to the nearest tenth.  yr

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...
icon
Related questions
Question

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 79%? Round to the nearest tenth.
 yr
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Knowledge Booster
Point Estimation, Limit Theorems, Approximations, and Bounds
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, probability and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
A First Course in Probability
A First Course in Probability
Probability
ISBN:
9780321794772
Author:
Sheldon Ross
Publisher:
PEARSON