Question

Nandlal bought 20 dozen notebooks at rs. 156per dozen. he sold 8 dozen of them at 10%gain and the remaining 12 dozen at 20% gain. what is his gain per cent in the whole transaction

Answer 1

this is the correct ans

Answer 2

Answer:16%

Step-by-step explanation:

20 dozen notebook bought in = 156 rs.

price of 1 dozen = 7.80 rs.

price after 10% gain = 7.80 + 10% of 7.80

= 7.80 + 0.78

= 8.58 rs.

price after 20% gain = 7.80 + 20% of 7.80

= 7.80 + 1.56

= 9.36 rs.

so total sale = 8*8.58 + 12 * 9.36

= 68.64 + 112.32

= 180.96 rs.

as we know that

%profit =

$=\frac{180.96-156}{156}*100\\\\=16$

profit = 16%