MathematicsVariationJAMB
y varies directly as x and inversely as z. y = 6 when x = 4 and z = 2. Find y when x = 9 and z = 3.
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Answer: B. 9
y = kx/z with k = 3; y = 3 × 9/3 = 9.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.