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

[EX Q]: Problem: a house wife saved $ 5 in buying an item on sale . if she spent $ 48 for the item , approximately how much percent she saved in the transaction ?
[EX A]: 10 %

[EX Q]: Problem: if the average ( arithmetic mean ) of a and b is 45 and the average of b and c is 80 , what is the value of c − a ?
[EX A]: 60

[EX Q]: Problem: nitin ranks 24 th in a class of 58 students . what is rank from the last ?
[EX A]:
34