Question

A man bought 10 pencils for ₹11 and sold 11 pencils for ₹10. Find his profit or loss percent.

Answer 1

Answer:

C.P of 11 pencils= Rs 10

C.P of 1 pencil= 10/11

C.P of 10 pencil=Rs 10×10/11

= 100/11

S.P of 10 pencil= Rs 11

Gain=S.P-C.P

=11-100 = 121-100/11 = 21/11

Gain= Rs 1.9

Answer 2

Answer:

Loss of 17.36%

Step-by-step explanation:

The man bought 10 pencil for Rs. 11

$\therefore The cost for one pencil = \frac{11}{10}$

The man sold 11 pencil for Rs. 10

$\therefore 1 pencil were sold for Rs. \frac{10}{11}$

$\therefore Loss = \frac{11}{10}-\frac{10}{11} = \frac{11^2-10^2}{11\times10} = \frac{21}{110}$

$\therefore The percentage of Loss \frac{\frac{21}{110}}{\frac{11}{10}}\times100=\frac{21\times10}{110\times11}\times100=\frac{2100}{121}=17.36\%$