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To enter a club, a person's age must not be less than 18 years. If the person's age is \(a\) years, which inequality is correct?

Answer and explanation

Correct answer: \(a\ge 18\)

“Not less than 18” means “at least 18,” so the age can be 18 or any greater value: \(a\ge 18\). Option B, \(a\le 18\), means the age is at most 18 and reverses the intended condition. In exams, remember that “at least” corresponds to \(\ge\), while “at most” corresponds to \(\le\).

Related tags

Linear InequalitiesInequality SymbolsReal Life ApplicationsAt LeastIntroduction To InequalitiesMathematicsClass 11 Mcq

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