1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# A women bought a certain number of books for Rs. 200. She kept one for her own and sold the rest at the rate Rs. 40 more than she gave for one book. Besides getting her own book for nothing, she made a profit of Rs. 100. How many books did she buy?

A
10
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
20
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
C
30
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
D
40
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
Open in App
Solution

## The correct option is D 10n= number of books purchasedp= price paid per booknp=200, so p= 200n(n−5)(p+40)=300 (As per the statement given)np+40n−5p−200=300200+40n−1000n−200−300=040n2−300n−1000=0On factoring, we get(n−10)(n+2.5)=0n=10 or −2.5Answer cannot be negative.So, number of books =10.

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Solving QE by Completing the Square
MATHEMATICS
Watch in App
Join BYJU'S Learning Program