Rahul Sofat Solutions for Chapter: Percentage and Its Applications, Exercise 4: THINKING SKILLS

In an examination, Swadha secured $320$ marks. If her aggregate is $80\%$, what is the maximum possible marks out of which Swadha scored these marks?

In an election, $10\%$ of the total votes were declared invalid. If a candidate got $40\%$ of the valid votes and if the total number of votes polled were $\mathrm{6,00,000}$, find the number of valid votes polled in favour of the candidate.

By selling a mobile phone for $₹ 4000$, a person loses $15\%$. For what amount should he sell it so that he gains $10\%?$

A sum of money amounts to $₹ 4480$ at $6\%$ simple interest per annum at the end of $2$ years. Find the principal. (Write the answer without rupee symbol)

Karan borrowed $₹ 1500$ from a financer. After $3\frac{1}{2}$ years he paid $₹ 2655$ to the financer and cleared the accounts. Find the rate of interest charged.