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19 September, 14:51

In a collection of 80 books, 34 have leather covers and 18 were published before 1850. If 42 of these books were published after 1850 and do not have leather covers, how many books were published after 1850 and have leather covers?

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  1. 19 September, 16:52
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    After 1850, number of books published with leather cover is 16 books

    Step-by-step explanation:

    Total number of book collection = 80 books

    number of books with leather cover = 34 books

    Before 1850,

    number of books published with leather cover = 18 books

    After 1850,

    number of books published without covers = 42 books

    number of books published with leather cover = x

    number of books without cover = 80 - 34

    = 46 books

    number of books with leather cover = Before 1850, number of books published with leather cover + After 1850, number of books published with leather cover

    34 = 18 + x

    x = 34 - 18

    =16 books
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