Hi swerve,
We're told that in a survey it was found that 60% of those surveyed liked honey, 40% of the people liked sugar and 30% liked both honey and sugar. If 100 people took the survey, we're asked for the number who liked NEITHER honey nor sugar. This is an example of a standard Overlapping Sets question and can be solved in couple of different ways. Here's how you can use the Overlapping Sets formula to get to the answer:
Total = (Group 1) + (Group 2) - (Both) + (Neither)
Here, Group 1 will be those who liked honey and Group 2 will be those who like sugar:
100 = 60 + 40 - 30 + (Neither)
100 = 70 + (Neither)
30 = Neither
Final Answer: B
GMAT assassins aren't born, they're made,
Rich