In a survey, 75% of respondents said that they watch TV for one hour each day. If 30 respondents said they watch TV for one hour each day, how many respondents took the survey in total?
A
70
B
22.5
C
2250
D
40
Let X be the total number of respondents who took the survey.
The number of respondents who watch TV for one hour each day is X * 75% = X * 0.75.
Since 30 respondents said they watch TV for one hour each day, then X * 0.75 = 30.
Thus, X = 30 / 0.75 = 40.
Therefore, the answer is D) 40.