The task is to generate the correct answer for a given math problem.
--------
Question: Problem: the smallest value of n , for which n + 2 is not a prime number , is

Answer: 2,4


Question: Problem: a 340 - liter solution of kola is made from 88 % water , 5 % concentrated kola and the rest is made from sugar . if 3.2 liters of sugar , 10 liter of water and 6.8 liters of concentrated kola were added to the solution , what percent of the solution is made from sugar ?

Answer: 7.5 % .


Question: Problem: marginal cost is the cost of increasing the quantity produced ( or purchased ) by one unit . if the fixed cost for n products is $ 15,000 and the marginal cost is $ 200 , and the total cost is $ 25,000 , what is the value of n ?

Answer:
50