In a group of 150 readers who read science fiction or literacy works or both, 120 read science fiction and 90 read literacy works. How many read both science fiction and literacy works?
Choose the most appropriate option
A) 70  B) 60  C) 90  D) 100  E) 110
Consider total number of reader n(S U L) = 150   People who read science fiction n(S) = 120   People who read literacy works n(L) = 90   both science fiction and literacy n(S âˆ© L) = ?   n(S U L) = n(S)+ n(L) - n(S âˆ© L)   150 = 120 + 90- n(S âˆ© L)   n(S âˆ© L) = 210 -150   n(S âˆ© L) = 60   SO People read both science fiction and literacy works are 160   ANSWER:60
<result>B</result>
In a group of 150 readers who read science fiction or literacy works or both, 120 read science fiction and 90 read literacy works. How many read both science fiction and literacy works?