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

[EX Q]: Problem: how many liters of a 40 % iodine solution need to be mixed with 35 liters of a 20 % iodine solution to create a 32 % iodine solution ?
[EX A]: 102

[EX Q]: Problem: if | x - 9 | = 3 x , then x = ?
[EX A]: - 4.

[EX Q]: Problem: the average weight of a group of persons increased from 48 kg to 51 kg , when two persons weighing 78 kg and 93 kg join the group . find the initial number of members in the group ?
[EX A]:
23