Question

If cost of 35 books is Rs 7000. calculate the cost of 25 books (as 10 books were damaged by insects) at what price will u sell the remaining to gain 10%

please reply quick ​

Answer 1

Answer:

Cost of 25 books = Rs 5000

We should sell the remaining books at Rs 7700 (i.e. Rs 308/1 book) to gain 10%.

Step-by-step explanation:

Here,

C.P. of 35 books = Rs 7000

C.P. of 1 book = Rs (7000/35)  = Rs 200

C.P. of 25 books = Rs (200*25)  = Rs 5000

To gain 10%,

S.P. = C.P. + Profit

      = 7000 + Profit% of C.P.

      = 7000 + 10% of 7000

      = 7000 + 700

∴ Total S.P. = Rs 7700

  S.P. of 1 book = Rs (7700/25)  = Rs 308