Answer:
C. 20
Step-by-step explanation:
Given
30 towels= 90$
450$-90$=360$
360$\18$=20 basketballs
His profit is 105 rs
if he bought 7 books for 525 RS,that means 1 book costs 75 rs
if he sold 4 books for 360 RS,that means 1 boo costs 90 RS
90×7=630.
630-525=105
d 10
