AnswersProbability and Statistics with Applications Honors Sem-2-FL-1210300 2024-2025Combining Two Random VariablesQuestion 5
5
QuizMultiple Choice
Combining Two Random Variables
Question 5 • Probability and Statistics with Applications Honors Sem-2-FL-1210300 (2024-2025)
JT has two jobs. He mows yards and washes cars in his neighborhood. Let X represent the amount of weekly earnings for mowing yards, and let Y represent the amount of weekly earnings for washing cars. The mean of X is $60, and the mean of Y is $35. Which answer choice correctly calculates and interprets the mean of the sum, S = X + Y?
Answer
A
; next week, JT will earn $47.5.
B
; JT can expect to earn $47.5, on average, in a typical week.C
; next week, JT will earn $95.
D
; JT can expect to earn $95, on average, in a typical week.