Katie works as a waitress and records her monthly tips in the table shown below. If Katie decided not to work the month of November, how would her five month average compare to her six month average for monthly tips?JuneJulyAugustSeptemperOctoberNovember$133.45 $235.31 $239.45 $258.87 $298.45 $115.67

The six-month total is $1,281.20, so the six-month average is $1,281.20 ÷ 6 = about $213.53. Without November, the five-month total is $1,165.53, giving an average of $1,165.53 ÷ 5 = about $233.11. The average would increase by $233.11 − $213.53 = $19.57, so the correct choice is “Her monthly average would have increased by $19.57.”

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