20. Consider the following probability distribution function for a discrete random variable X: 1 2 5 10 0.1 0.4 0.2 (a) What is P(X <8)? X P(X) 0.3 (b) What is the expected value of X? (c) What is the variance of X?
20. Consider the following probability distribution function for a discrete random variable X: 1 2 5 10 0.1 0.4 0.2 (a) What is P(X <8)? X P(X) 0.3 (b) What is the expected value of X? (c) What is the variance of X?
Chapter9: Sequences, Probability And Counting Theory
Section9.7: Probability
Problem 1SE: What term is used to express the likelihood of an event occurring? Are there restrictions on its...
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Transcribed Image Text:20. Consider the following probability distribution function for a discrete random variable X:
2 5 10
0.4 0.2
(a) What is P(X <8)?
1
P(X) 0.3
(b) What is the expected value of X?
(c) What is the variance of X?
0.1
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