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A bag’s weight should not exceed 15 kilograms. If its weight is w, what is the correct inequality?

Answer and explanation

Correct answer: w ≤ 15

The governing concept is translating an upper-limit statement into an inequality. The phrase “should not exceed 15 kilograms” means that the weight may be less than 15 kilograms or exactly 15 kilograms, but it cannot be greater than 15. Therefore the correct mathematical statement is w≤15. For example, 10 kg and 14.8 kg are allowed, and exactly 15 kg is also allowed; 15.1 kg is not allowed. Option A, w<15, wrongly excludes the permitted boundary value 15. Options C and D describe weights above 15 or at least 15, which express a lower limit rather than a maximum. The wording “not exceed” always includes the stated maximum when no additional restriction is given. Hence option B is the unique correct inequality.

Related tags

Linear-InequalitiesWord-ProblemMaximum-LimitInequality-TranslationIntroduction To InequalitiesLinear InequalitiesMathematicsClass 11 Mcq

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