Kasey needs 1.5 cups of milk and 4 cups of sugar to make 12 muffins. She plans to make 36 muffins . How many fl oz of sugar does
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Consider such events:
A - selected student is freshmen
B - selected student is girl
- selected student is freshman is girl
- choosen girl is freshmen.
Use formula .
From the table you can see that girls that are freshmen are 4 from all 30 people, then . There are 18 girls, then
. Substitute into the formula:
.
Answer: .