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    Question

    src="https://www.ixambee.com/questionimage/Chapter/1659603720-Q14.png" alt="" /> The number of students whose height is in the class interval 170-175 is what per cent less than the number of students whose height is in the interval 165-170? (correct to one decimal place)
    A 17.3% Correct Answer Incorrect Answer
    B 11.5% Correct Answer Incorrect Answer
    C 14.3% Correct Answer Incorrect Answer
    D 19.5% Correct Answer Incorrect Answer

    Solution

    Number of students in the interval of 170-175 = 12 Number of students in the interval of 165-170 = 14 Difference = 14 – 12 = 2 Percentage = (Difference/Number of students in the interval of 165-170) × 100 ⇒ Percentage = (2/14) × 100 ⇒ Percentage ≈ 14.28 ≈ 14.3 ∴ Students in the class interval of 170-175 are nearly 14.3% less than the students in the class interval of 165-170

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