Boolean conjunction

[calvinleeabc]

Please help!


In a search engine using the "Boolean conjunction" model, suppose:
(a) searching _information_ returns 10000 pages;
(b) searching _information literacy_ returns 2000 pages; and
(c) searching _literacy_ returns 8000 pages.


How many pages would be returned if we search _information OR literacy_?

 

[stapel]

In a search engine using the "Boolean conjunction" model, suppose:
(a) searching _information_ returns 10000 pages;
(b) searching _information literacy_ returns 2000 pages; and
(c) searching _literacy_ returns 8000 pages.

How many pages would be returned if we search _information OR literacy_?

How many of the pages in (b) are included in (a)? So how many pages in (a) do not include the word "literacy"? How many of the pages in (b) are included in (c)? So how many pages in (c) do not include the word "information"?