Question

marcos makes a table to show how many students in his class wear glasses. there are 18 boys and 14 girls in the class. there are 5 boys and 7 girls who wear glasses. which table correctly shows the data?

	glasses	no glasses	total
girls	7	7	14
total	12	20

	glasses	no glasses	total
girls	9	11	20
total	14	18

	glasses	no glasses	total
girls	18	7	25
total	32	12

	glasses	no glasses	total
girls	5	7	12
...	...	...	...

Explanation:

Step1: Calculate boys without glasses

Total boys: 18, boys with glasses: 5.
$18 - 5 = 13$

Step2: Calculate girls without glasses

Total girls: 14, girls with glasses: 7.
$14 - 7 = 7$

Step3: Verify total with glasses

Boys + girls with glasses: $5 + 7 = 12$

Step4: Verify total without glasses

Boys + girls without glasses: $13 + 7 = 20$

Answer:

The first table (topmost) is correct:

	Glasses	No Glasses	Total
Girls	7	7	14
Total	12	20	32