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

InterviewSolution

1.

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

Answer»

More the dolls, more will be the cost. So it is a direct proportion.

Let no. of dolls be x, \(\frac{18}{630}=\frac{\text{x}}{455}\)

⇒ 630 × x = 18 × 455

⇒ x = \(\frac{18\,\times\,455}{630}\) = 13

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