Question

a random sample of students was surveyed and asked to list their grade level and whether or not they have a pet. results are shown in the table below, but some values are missing. fill in the missing values.
pets survey
6th grade: pets = 28, total = 51
7th grade: pets = 17, total = 38
8th grade: pets = 22, no pets = 30
total: missing values for pets, no pets, and overall total

Explanation:

Step1: Find "No Pets" for 6th grade

Total = Pets + No Pets. So No Pets = Total - Pets. For 6th grade, No Pets = \(51 - 28=23\).

Step2: Find "No Pets" for 7th grade

Using Total = Pets + No Pets. No Pets = \(38 - 17 = 21\).

Step3: Find Total for 8th grade

Total = Pets + No Pets. For 8th grade, Total=\(22 + 30=52\).

Step4: Find Total "Pets"

Sum of Pets: \(28+17 + 22=67\).

Step5: Find Total "No Pets"

Sum of No Pets: \(23+21+30 = 74\).

Step6: Find Grand - Total

Grand - Total = Total Pets+Total No Pets=\(67 + 74=141\).

Answer:

	Pets	No Pets	Total
7th grade	17	21	38
8th grade	22	30	52
Total	67	74	141