In a group of600 readers who read science fiction or literacy works or both, 200 read science fiction and 230 read literacy works. How many read both science fiction and literacy works?
Choose the correct choice from the following:
A) 70  B) 30  C) 25  D) 100  E) 110
Consider total number of reader n(S U L) = 600   People who read science fiction n(S) = 400   People who read literacy works n(L) = 230   both science fiction and literacy n(S âˆ© L) = ?   n(S U L) = n(S)+ n(L) - n(S âˆ© L)   600 = 400 + 230 - n(S âˆ© L)   n(S âˆ© L) =630 -600   n(S âˆ© L) = 30   SO People read both science fiction and literacy works are 30   ANSWER:30
<result>B</result>
In a group of600 readers who read science fiction or literacy works or both, 200 read science fiction and 230 read literacy works. How many read both science fiction and literacy works?