In a survey of 500 population of a village,325 people drink filtere water and 230 people drink boiled water. How many people drink both filtered and boiled water? Find by using Venn diagram
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55 people
total no. of people=500
no. of people drink filtre water=325
no.of people drink boiled water= 230
therefore,total no. of people - ( no. of people drink filtre water+no.of people drink boiled water)
500-(325+230)
=500-(555)
= -55
therefore 55 people
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