Examine the information given in the following paragraph and answer the items that follow : · as printed by UPSC
Which lecture is scheduled before the Mathematics lecture ?
aEconomics
bHistory
cStatistics
dEnglish
AnswerUPSC’s answer is (a).
Mathematics has to follow Economics immediately, and English has to come right before Economics. With History fixed on Tuesday, those three fill Wednesday to Friday as English, Economics, Mathematics, and Statistics is on Monday. The lecture scheduled just before Mathematics, on Friday, is therefore Economics, on Thursday. Remember to fix the one forced day, History on Tuesday, before placing the chain.
Why each option is right or wrong
(a) Right. Economics is on Thursday, the day right before Mathematics.
(b) Wrong. History is on Tuesday.
(c) Wrong. Statistics is on Monday.
(d) Wrong. English is on Wednesday, two days before Mathematics.
Answer: UPSC’s key. Explanation: written by UPSC Grade, not by UPSC.
