Question

If 18 dolls cost Rs. 630, how many dolls can be bought for Rs. 455 ?

Answer 1

Let no. of dolls = x, then

No. of dolls : Cost :: Dolls : Cost

18 : Rs. 630 :: x : Rs. 455

(Less cost, less dolls)

$\therefore x=\frac{18\times 455}{630}=13$

No. of dolls =- 13