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If tn denotes the nth term of an arithmetic progression with t50 - t20 = 15, then the common difference is :
Correct Answer: (d)
Official keyThis question appeared in the NPSC Prelims 2015 examination (GS). It is Question 93 out of 200 questions in this paper.
This question was part of the NPSC Prelims 2015 (GS). The NPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all NPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.