Question
The total population of a village is 1000. The number of
males and females increases by 6% and 8% respectively and consequently the population of the village becomes 1075. What was the number of males in the village?Solution
Population of a village increases from 1000 to 1075 So, net % increase in population = (75/1000)× 100 = 7.5% 
Hence, the number of males in that village was = (1/4) × 1000 = 250
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What will come in place of '?' in the following equation, if '+' and '–' are interchanged and '×' and '÷' are interchanged.Â
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