Identify the sampling method. you want to determine the number of text messages students at your school send in a month. you randomly ask 10 students from each grade. a.) random b.) systematic c.) stratified d.) none of these

You want to determine the number of text messages students at your school send in a month. You randomly ask 10 students from each grade.

This is a random sampling method.

This sampling method is a basic sampling method where we select a group of subjects (a sample) for study from a larger group or  population. Each individual is chosen entirely by chance. Each member of the population has an equal chance of being included in the sample.

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315