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

Problem: at a certain fruit stand , the price of each apple is 40 cents and the price of each orange is 60 cents . mary selects a total of 30 apples and oranges from the fruit stand , and the average ( arithmetic mean ) price of the 30 pieces of fruit is 56 cents . how many oranges must mary put back so that the average price of the pieces of fruit that she keeps is 52 cents ?
1

Problem: find the least number must be subtracted from 62575 so that remaining number is divisible by 99 .
7

Problem: the speed of a car is 60 km in the first hour and 30 km in the second hour . what is the average speed of the car ?

45 kmph