A grocer purchased 20 kg of rice at the rate of Rs. 15 per kg. and 30 kg of rice at the rate of Rs. 13 per kg . At what price per kg should he sell the mixture to earn 331 / 3 % profit on the cost price ?
A. Rs.28.00
B. Rs.20.00
C. Rs.18.40
D. Rs.17.40
Answer: Option C
Solution (By Examveda Team)
20 kg Rice @ 15/ kg = 30030 kg Rice @ 13/ kg = 390
TOTAL C.P. = 690
C.P. / kg = 690/50 = 13.8
S.P. for gain of 33% =
\frac{133}{100} \times 13.8 = 18.4
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