4. Probability Distributions: Random Variables
Probability Distributions
Let #X# denote the number of people who enter an elevator on the ground floor of an office building for any randomly observed elevator trip. The elevator can hold no more than #6# people.
Based on long-term observation, it has been determined that #X# has the following probability distribution:
\begin{array}{c|cccccc}
x&1&2&3&4&5&6\\
\hline
\mathbb{P}(X = x)&0.29&0.27&0.19&0.14&0.09&0.02\\
\end{array}
What is the probability that at least #5# people enter the elevator for a randomly observed elevator trip?
| #\mathbb{P}(X \geq 5)=# |
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