21.
If x% of 500 = y% of 300 and x% of y% of 200 = 60, then x = ?

22.
In a city, 35% of the population is composed of migrants, 20% of whom are from rural areas. Of the local population, 48% is female while this figure for rural and urban migrants is 30% and 40% respectively. What percentage of the total population comprises of females ?

23.
A person speeds 75% of his income. If his income increase by 20% and expenses increase by 15%, his saving will increase by :

24.
The population of a town is 1771561. If it had been increasing at 10% per annum, its population 6 years ago was :

25.
In some quantity of ghee, 60% is pure ghee and 40% is vanaspati. If 10 kg pure ghee is added, then the strength of vanaspati ghee becomes 20%. The original quantity was :

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