66. In a class 60% students are boys, 40% of boys and 60% of the girls are failed. Find the total no. Of students in the class. If the total number of failed students are 480
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40% of failed boy student = 240(24% of boys)
40% of failed girl student = 240( 24% of girls)
total no of failed students 480(48% of total)
hence the total no of students 1000
40% of failed girl student = 240( 24% of girls)
total no of failed students 480(48% of total)
hence the total no of students 1000
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