Let X denote the amount of time in hours that a battery on a solar calculator will operate adequately between exposures to light sufficient to recharge the battery. Assume that the density for X is given by: -3 f(x) f(x)=(25/3)x³ 2

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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Question 5
Let X denote the amount of time in hours that a battery on a solar calculator
will operate adequately between exposures to light sufficient to recharge the
battery. Assume that the density for X is given by:
f(x)
21 22 ²
f(x)=(25/3)x
الرد ا اار
2<x< 10
1. Find F(x), and use it to find the probability that a randomly selected solar
battery will last at least 5 hours before needing to be recharged. laby sp
b. Find the probability that a randomly selected solar battery will last between
7 hours and 9 hours before needing to be recharged.
Transcribed Image Text:Question 5 Let X denote the amount of time in hours that a battery on a solar calculator will operate adequately between exposures to light sufficient to recharge the battery. Assume that the density for X is given by: f(x) 21 22 ² f(x)=(25/3)x الرد ا اار 2<x< 10 1. Find F(x), and use it to find the probability that a randomly selected solar battery will last at least 5 hours before needing to be recharged. laby sp b. Find the probability that a randomly selected solar battery will last between 7 hours and 9 hours before needing to be recharged.
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