Math Problem Statement
The discrete random variable RR is such that R∈{2,4,5,7}R∈{2,4,5,7}.Given that P(R=r)=k(r+1)r+2P(R=r)=r+2k(r+1), then find.
(a)
The value of the constant kk.
(b)
P(R⩽4)P(R⩽4).
Note :Note:Give your answer in simplest fraction form only.
Solution
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Math Problem Analysis
Mathematical Concepts
Probability Theory
Discrete Random Variables
Probability Mass Function
Formulas
Probability mass function for discrete random variables
Theorems
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Suitable Grade Level
High School
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