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![A discrete random variable \( X \) has the following probability distribution:
a) Calculate
\[
P(X<80)
\]
b) Calculate
\[
P(X](https://media.cheggcdn.com/study/0ff/0fff2bb1-efc0-4b6c-8825-a4e521d4c24c/image)
Expert Answer
discrete random variable x has the foll