If three out of seven people surveyed prefer brand B over brand A, then how many out of seven prefer brand A? Assume that everyone surveyed liked either brand A or B, but no one chose "both" or "neither.
If three out of seven prefer brand B, then four out of seven must prefer brand A because there are only two options and the total number of people surveyed is seven.
To find out how many out of seven people prefer brand A, we can subtract the number of people who prefer brand B from the total number of people surveyed.
If three out of seven people prefer brand B, then we have:
Total number of people who prefer brand A = Total number of people surveyed - Number of people who prefer brand B
Total number of people who prefer brand A = 7 - 3
Total number of people who prefer brand A = 4 out of 7 people prefer brand A.