Question

a shopkeeper buys 50 bananas at 5 for rs 3 and sell them at 10 for rs 7. what is his gain %​

Answer 1

$Number \: of \:bananas \: shopkeeper \\biught = 50$

$Cost \: of \: 5 \: bananas = Rs \: 3$

$Cost \: of \: 50 \: bananas = Rs \: 30\: ---(1)$

$selling\:price \: of \: 10 \: bananas = Rs \: 7$

$Selling\:price \: of \: 50 \: bananas = Rs \: 35\: ---(2)$

$Gain (g) = selling \:price - cost \:price \\= Rs \:35 - Rs \:30 \\= Rs \: 5$

$Gain \: percentage = \frac{gain }{cost \:price } \times 100 \\= \frac{5}{30} \times 100 \\= \frac{50}{3} \\= 16\frac{2}{3}\%$

Therefore.,

$\red { Gain \: percentage} \green {= 16\frac{2}{3}\% }$

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