Question

a cafeteria kept track of the type of milk students chose at lunch today.
complete the two - way table to display the relative frequencies by row.
8th grade 7th grade plain chocolate total
milk
8th grade 7th grade plain chocolate
milk
36% 64% 100% 100%

Explanation:

Step1: Calculate the total number of 8th - grade students

The total number of 8th - grade students is \(28 + 22=50\).

Step2: Calculate the percentage of plain milk for 8th - grade students

The formula for percentage is \(\text{Percentage}=\frac{\text{Part}}{\text{Whole}}\times100\). For plain milk in 8th - grade, \(\text{Part} = 28\) and \(\text{Whole}=50\). So the percentage is \(\frac{28}{50}\times100 = 56\%\).

Step3: Calculate the percentage of chocolate milk for 8th - grade students

Using the same formula, \(\text{Part} = 22\) and \(\text{Whole}=50\). So the percentage is \(\frac{22}{50}\times100=44\%\).

Answer:

The first blank (plain milk for 8th - grade) is \(56\%\) and the second blank (chocolate milk for 8th - grade) is \(44\%\).