Question

During the launch of a new book, the publisher gave away $30$ copies of the book as complimentary copies of the $VIPs$ who were present at the launch and sold the remaining at a cost of $Rs500$ each. If the total collection on that day was $Rs7,35,000$, how many books were given out on that day as complimentary copies?

Answer 1

Let the total numbers number of books be $x$.

given to VIP's $=30$

Now remaining copies $=x-30$

Cost of each book $=500$

total collection $=7,35,000$

Then,

$(x-30)\times 500=735000$

Therefore,

$x=1500$

total number of copies $=1500$

Total number of complimentary copies $=1500-30=1470$