The task is to generate the correct answer for a given math problem.

Problem: 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 ?
60

Problem: if p represents the product of the first 16 positive integers , then p is not a multiple of
5

Problem: a library has an average of 540 visitors on sundays and 240 on other days . the average number of visitors per day in a month of 30 days beginning with a sunday is :
290