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

[EX Q]: Problem: what is the probability of getting a queen or spade from a set of cards ?
[EX A]: 4 / 13

[EX Q]: Problem: a certain debt will be paid in 65 installments from january 1 to december 31 of a certain year . each of the first 20 payments is to be $ 410 ; each of the remaining payments is to be $ 65 more than each of the first 20 payments . what is the average ( arithmetic mean ) payment that will be made on the debt for the year ?
[EX A]: 455

[EX Q]: Problem: it costs $ 2 for the first 1 / 5 hour to use the laundry machine at the laundromat . after the first ¼ hour it costs $ 12 per hour . if a certain customer uses the laundry machine for 2 hours and 15 minutes , how much will it cost him ?
[EX A]:
$ 29 .