A boy spends Rs 20 to purchase toffees at Rs 1 each. Next day, he purchased some toffees for Rs 40 with a discount of 50 paise per toffee. What is the average price per toffee (in paise)?

Answer: B. 60

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Source: SSC CHSL (Tier-1) 2017 Online Exam Paper held on 15 March 2018, Evening Shift (Quantitative Aptitude) — SSC-published paper with official answer key, via sscportal.in · official-answer-key