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

[EX Q]: Problem: the average ( arithmetic mean ) of 8 numbers is 43.1 . if the sum of half of these numbers is 158.4 , what is the average of the other half ?
[EX A]: 46.6

[EX Q]: Problem: find the value o f 72519 x 9999 = m ?
[EX A]: m = 725117481

[EX Q]: 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 ?
[EX A]:
60