Books read within the past year || Frequency || Relative Frequency

Question

-----------------------------------------------------------------------------------------
|| none || 10 || ||
|| 0-4 || 4 || ||
|| 5-9 || 1 || ||
|| 10-14 || 10 || ||
|| 15-19 || 2 || ||
|| 20-25 || 44 || ||

To find the relative frequency, I tried doing 10/44, 4/44, 1/44 etc, But it's the wrong answer apparently. All help is appreciated!

Answer 1

There are 71 total books, so that is what you need to divide by, so the weighted sum = 1.