answer question no 8 9 10 11 12
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ques 8. let total no. of students be x
therefore, 84% of x + 780 = x
84/100 × x +780= x
21x/25 + 780 = x
x - 21x/25=780
25x- 21x/25=780
4x = 780 × 25
x= 780×25/4
x= 195× 25
x= 4875
therefore, 84% of x + 780 = x
84/100 × x +780= x
21x/25 + 780 = x
x - 21x/25=780
25x- 21x/25=780
4x = 780 × 25
x= 780×25/4
x= 195× 25
x= 4875
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