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Sanjay writes a letter to his friend, Kesari. It is known that one out of 10 letters that are posted does not reach its destination. If Sanjay does not receive a reply to his letter, then what is the probability that Kesari did not receive Sanjay’s letter? It is certain that Kesari will definitely reply to Sanjay’s letter if he receives it.
This question appeared in the PPSC Prelims 2021 examination (GS-II). It is Question 49 out of 80 questions in this paper.
This question was part of the PPSC Prelims 2021 (GS-II). The PPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all PPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.