A group of students were surveyed to see how many used product A, product B, or product C. The following is a Venn diagram showing the results of the survey: 
How many students surveyed used none of these products?
Definitions:
Language
A complex system of communication using sounds, symbols, or gestures that follow specific rules for conveying information.
Meaning
The significance, purpose, or understanding attributed to something.
Phonemes
The smallest unit of sound in a language that can distinguish one word from another.
Linguistic Heuristics
Cognitive shortcuts used in language processing and understanding, often applied for quick decision making or problem solving.
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