MathematicsProgressionsJAMB
The first term of a GP is 18 and its sum to infinity is 27. Find the common ratio.
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Answer: B. 1/3
18/(1 − r) = 27 gives 1 − r = 2/3, so r = 1/3.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.