Chendi sits at a cafe for 30 minutes sipping tea and watching cars go by. Assume:
Assume also that U, J, and X are independent of each other, and let the total number of cars be T=U+J+X.
Some parts below ask for numerical values as well as math expressions. There is a code cell at the end of the exercise for numerical computations.
a) Write a math expression for ?(?≥9,?≥9) that does not include any infinite sums. Then use the code cell to find its numerical value, and provide the numerical value along with your expression.
b) Write a math expression for ?(?=?). It is all right to have infinite sums in this one.
c) Write a math expression for ?(?=20)
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