From 1200 copies of a new book , 50 of them are chosen at random , of which x of them are misprinted ,
a ) If the relative frequency of misprinted copies out of the chosen ones is 1/25 , find x .
b ) Among the 1200 copies of the new book , estimate the number of misprinted copies based on hte above situation .
Math一問~~~~~
2007-02-14 9:21 pm
回答 (2)
2007-02-14 9:27 pm
✔ 最佳答案
a) x=50*1/25
x=2
therefore 2 books are misprinted in every 50 books.
b) 1200*1/25
=48
therefore 48 books are misprinted in every 1200 books.
2007-02-14 9:29 pm
a)係48本
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