Answer:
The correct answer option is D. 0.42.
Step-by-step explanation:
We are given the results of a survey in which people were asked if they prefer reading books or e-books.
We are to find the marginal frequency of the number of people who prefer to read books.
For that, we will divide the total number of people who prefer reading books by the total number of people surveyed.
Marginal frequency = 105/250 = 0.42
