"Average" is misleading. she is earning income from both jobs to determine her weekly average.
$110 + $75 = $185
Your friend has two jobs. She works a different number of hours each week, so her paycheck for each job is different from week to week. Her average weekly paycheck is $110 for job one and $75 for job two. What is her average weekly income if these are her only jobs?
Would the answer be $185 or $92.5?
2 answers
But the question doesn't mention anything about combining the two variables into a new random variables, so we wont' add.