Question

60% of the students in a school are girls. If the number of boys in the school is 320 the total number of students in the school is
(A) 400 (B) 450 (C) 600 (D)800

Answer 1

Solution:



Option D is correct.


800


Solution:


Let the total number of students in the School= x


Number of boys in the School= 320



Number of girls in the School= 60%of x



A.T.Q

Number of Girls +Number of boys = Total number of students in the School



60%of x + 320 = x


60x/100 +320 = x


3x/5 +320= x


320= x -3x/5


320 =( 5x-3x)/5


320 ×5 = 2x


x= (320 ×5)/2


x= 160×5


x= 800



Total number of students in the School= 800

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Hope this will help you....