Question

a survey showed that 30% of students bring their lunch to school. the survey polled 300 students. how many of the 300 students do not bring their lunch to school?
90
200
100
210

Explanation:

Step1: Calculate the percentage of students who do not bring lunch

If 30% bring lunch, then the percentage of students who do not bring lunch is \(100\% - 30\%=70\%\)

Step2: Find the number of students who do not bring lunch

We know there are 300 students surveyed. To find 70% of 300, we use the formula \(n = p\times N\), where \(p = 0.7\) (70% in decimal form) and \(N = 300\). So \(n=0.7\times300 = 210\)

Answer:

210