A fruit seller declares that he sells fruits at the cost price However, He use a weight of 450 g instead of 500 g. His percentage profit is

Go through options. Consider option (b)
200 x 3.25 - 200 x 3 = Rs. 50 = ( 30+20 )
Hence option, (b) is correct


Alternatively: Rs. 0.25 is the difference on 1 banana
Rs. 1 is the difference on 1/0.25 = 4 bananas
Rs. 50 is the difference on 4 x 50 = 200 bananas

Price after 10% discount = 10000 - 10 % of 10000 = 10000 - 0.1 x 10000 = 9000
Price after another 20% discount = 9000 - 20 % of 9000 = 7200
Price after 10% of transportation charges = 7200 + 7200 x 0.1 = 7920
Price after 10% of profit = 7920 + 7920 x 0.1 = 8712
? Selling price = 8712

CP = 405 / 0.9 = 450
New SP = Rs. 465
Profit (%) = [465-450 / 450] X 100 = 3.33%

Here, 6 apples are gained over 18 apple.
? Gain percent = (6/18) x 100 %
= 33¹/₃%

Profit on one calculator
= 250[1- (100/114)] = ? 30.70

? Total amount of the profit
= 19 x 7 x 30.70
= ? 4083.10

The best way is to go through option. Consider option (a)
Total profit = 15000 x ( 2 / 3 ) x 5 %
= 15000 x ( 2 / 3 ) x ( 5 / 100) = 500

Total loss = 15000 x ( 1 / 3 ) x 2 %
= 5000 x ( 1 / 3 ) x ( 2 / 100) = 100

Net gain = ( 500 - 100 ) = Rs. 400
Hence: option (a) is correct.

Alternatively : [( 1.05 X 2x/3 + 0.98 x/3) - x] = 400
? x=15000

Let the cost price of one gram be Rs. 1, then the mark up price be Rs. 1.2 per g.

Now he sells 1000 g which seems to be 1250 g so he charges to a customer 1250 X 1.2 = Rs. 1500 for 1000 g (or Rs. 1000)

Thus his profit % 1500 -1000 / 1000 X 100 = 50 %

Cost price (CP) = 10 / 12 ,
Selling price (SP) = 12 / 10


Profit (%) = [ (SP - CP) / CP ] x 100
? Profit (%) = [( 12 / 10 - 10 / 12 ) / (10 / 12) ] X 100 = 44 %

Let's assume the cost price be (CP) = x
So selling price (SP) = 112.5x
Price marked on good ( MP ) = 300

According to question MP - 25% = SP
? x = 200, hence the cost price be Rs. 200.

Amount purchased = 1100 g
Amount sold = 900 g
Profit % = (200 / 900) X 100
= 22 ²/₉%