Grades 9-10 Video Solutions 2014-Grades 9-10 Video Solutions 2014 problem7

Grades 9-10 Video Solutions 2014 problem7

Video Transcription

Video Summary

The video addresses the negation of the statement "Everybody solved more than 20 problems." The original statement asserts that all participants solved at least 21 problems. To negate it, you express that not everyone did this, meaning at least one person solved fewer than 21 problems. This is equivalent to "Somebody solved less than 21 problems," which includes solving fewer than or exactly 20 problems. The correct choice for the negated statement is option B: "Somebody solved less than 21 problems."

Keywords

negation

logical statements

problem-solving

participants

quantifiers