- 04/15/2019 at 5:22 am #487990EduGorillaKeymasterSelect Question Language :
Directions: A merchant surveyed 400 people to determine the way they learned about an upcoming sale. The survey showed that 180 learned about the sale from radio, 190 from television, 190 from newspaper, 80 from radio and television, 90 from radio and newspaper, 50 from television and news paper and 30 from all three.
How many people did not come to know about the sale from any of these sources?
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