Question

Margie takes a random sample of 30 students in her seventh-grade class and finds that 75% of the sample prefers the color blue over the color red. There are 125 students in the seventh grade. Based on the sample proportion, about how many students in the seventh grade would be expected to prefer blue over red?

30
75
94
125

Answer 1

0.75*30= 22.5. 22.5/30=x/125
125/30=4.2 22.5*4.2= 94
Answer: 94