when 6 boys were admitted and and 6 girls left the percentage of boys increased from 60 % to 75% .find tue original no.og boys and girls in the class.
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assume there were x boys and y girls.total number was x+y.
as per question
(x+y).60/100=x
or,40x=60y
afer 6 boys admitted and 6 girls left total boys are (x+6),total girls are (y-6) and total number of students remained the same
so as per question now,
(x+y).75/100=x+6
or,25x+600=75y
now solving two equations we can find the number of boys and girls
as per question
(x+y).60/100=x
or,40x=60y
afer 6 boys admitted and 6 girls left total boys are (x+6),total girls are (y-6) and total number of students remained the same
so as per question now,
(x+y).75/100=x+6
or,25x+600=75y
now solving two equations we can find the number of boys and girls
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