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

[EX Q]: Problem: what is the total number of integers between 10 and 50 that are divisible by 2 ?
[EX A]: 19

[EX Q]: Problem: a bag contains 12 red marbles . if someone were to remove 2 marbles from the bag , one at a time , and replace the first marble after it was removed , the probability that neither marble would be red is 25 / 36 . how many marbles are in the bag ?
[EX A]: 48

[EX Q]: Problem: a man opens a shop . he buys water bottles for 50 cents each , fruit for 25 cents each , and snacks for a dollar each . he wants to start a bundle of selling a bottle a water , 3 snacks and 2 fruits for d dollars . every 5 th bundle sold will be sold for 2 dollars and a complimentary snack at the owner ' s expense . what should he charge at least to not lose any money ?
[EX A]:
4.6