Final answer:
To find out how many students brought their lunch, you calculate 5% of 1200 students, which gives you 60 students who brought lunch on Thursday.
Step-by-step explanation:
To calculate how many students bring their lunch to school every day, we need to find 5% of the 1200 students who attend Ridgewood Junior High School. Using the formula for percentage, which is the part equals the percentage (rate) multiplied by the whole, we can determine the number of students who brought their lunch on Thursday:
Number of students bringing lunch = 5% of 1200
Number of students bringing lunch = 0.05 × 1200
Number of students bringing lunch = 60
Therefore, 60 students brought their lunch to school on Thursday.