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math,(fraction)

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there were 25pupils in a class. they had 135 books altogether. two-fifth of the pupils were girls.they had the same number of books each. the remaining pupils were boys.each boy had one-third as many as each girl.how many books did each girl have?

  • math,(fraction) - ,

    girls = 2/5 * 25 = 10
    boys = 25-10 = 15

    If each girl had g books, each boy had g/3 book

    total books: 10g + 15g/3 = 135
    15g = 135
    g = 9

    so each girl had 9 books, each boy had 3.

    10*9 + 15*3 = 90 + 45 = 135 books in all

  • math,(fraction) - ,

    Girls= 2/5*25= 10
    Boys = 3/5*25= 15
    All books= 135 books
    135÷3= 45÷15= 3*3
    = 9 books

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