Question

the selling price of 10pencils is equal to the cost price of 11 pencils.what is the profit percent

Answer 1

let the s. p. of 1 article=Rs.1
then, S. P of 11 articles =Rs 11
amd s. p of 10 artcles will be Rs. 10
if c. p of 11 artcles = s. p. of 10 articles.. then...
c. p. of 11 articles =Rs, 10

Again,
C. p of 11 aricles =10 rupees
S. p of 11 articles = Rs. 11
profit percent =S. P-C. P. *100
-------------
C. P.
= > 1/10*100
=10 %