Question

a man purchased some oranges at 3 for rupees 15 and sold then 4 for rupees 24. He gained rupees 120 in the whole transaction. how many oranges did he purchased.

Answer 1

$let \: the \: number \: of \: orange \: be \: x \: then \: cp = 15 \div 3 \times x = 5x \: \: and \: sp = 24 \div 4 \times x = 6x \: i \: sove \: this \: question$