Evan would like to know how students feel about uniforms. Since there are too many people
at his school to survey individually, he surveys the first 50 students who arrive to school in the
morning. Is this a random sample? Justify your response.

Yes, this would be a random sample, because Evan isn't choosing a specific group of people to survey such as (all boys, all girls, certain age, or athletes.)

Hope this helps ;)

6 adults and 9 children went.

a + c = 15

12a + 9c = 153

12(6) + 9(9) = 153

72 + 81 = 153