GIVEN: A man purchases some mangoes at the rate of 24 mangoes for Rs. 1. CONCEPT: Basic concept of Profit and Loss. FORMULA USED: SP = CP × [1 + Profit]/100 CALCULATION: Given, CP of 24 mangoes is Rs. 1. ⇒ CP per mango = Rs 1/24 Also, Profit = 20 % of CP = 1/5 CP So, SP = CP + Profit = 6/5 CP. ⇒ SP per mango = Rs 6/5 × 1/24 = 1/20 Since, SP of 1 mango = Rs 1/20 ⇒ No. of Mangoes sold for Rs. 1 = 20