A seller sells oranges at the rate of 10 for Rs. 28, gaining thereby 40%. For how much did he buy a dozen oranges?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Rs. 24.
SP of 10 oranges = 28
CP of 10 oranges = 28 × (100/140) = 20
CP of 12 oranges = (20/10) × 12 = 24