X is a discrete random variable that takes values (1, 2, 3, 4, 5). P(X=3)=0.6 and P(X=5)=0.25. What is the cumulative mass function for X=5, i.e. F(5)?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
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X is a discrete random variable that takes values (1, 2, 3, 4, 5). P(X=3)=0.6 and P(X=5)=0.25. What is the cumulative mass function for X=5, i.e. F(5)? 

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