In a group of 650 readers who read science fiction or literacy works or both, 250 read science fiction and 550 read literacy works. How many read both science fiction and literacy works?	Answers
A) 650 B) 250 C) 150 D) 100 E) 400
150onsider total number of reader n(S U L) = 650   People who read science fiction n(S) = 250   People who read literacy works n(L) = 550   both science fiction and literacy n(S âˆ© L) = ?   n(S U L) = n(S)+ n(L) - n(S âˆ© L)   650 = 250 + 550 - n(S âˆ© L)   n(S âˆ© L) = 800 - 650   n(S âˆ© L) = 150   SO People read both science fiction and literacy works are 150   ANSWER:150
<result>C</result>
In a group of 650 readers who read science fiction or literacy works or both, 250 read science fiction and 550 read literacy works. How many read both science fiction and literacy works?