One rainy Saturday morning, Adam woke up to hear his mom complaining about the house being dirty. "Mom is always grouchy when it rains," Adam's brother said to him.
Adam decided to figure out if this statement was actually true. For the next month, he charted every time it
rained and every time his mom was grouchy. He found that rainy days and his mom being grouchy were
entirely independent events. Some of his data are shown in the table below.
Fill in the missing values from the frequency table.
Raining
Not raining
Row total
Grouchy
3
Not grouchy
27
Column total
10
20
30
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