What is profit and loss problem? Distribute a certain number of goods according to a certain number of people. In two kinds of distribution, one is surplus, the other is deficit, or both are surplus or both are insufficient. This application problem is called profit and loss problem.

The formula to solve the problem is:

Generally speaking, if there are gains and losses in the two distributions, there are: the total number of people participating in the distribution = (profit+loss) ÷ distribution difference? If you make a profit or lose money twice,

Yes: the total number of people participating in the distribution = (big profit-small profit) ÷ distribution difference?

The total number of people participating in the distribution = (big loss-small loss) ÷ Bad distribution? . So according to the formula and the meaning of the topic, this question is to find the total number of people participating in the distribution: according to "the total number of people participating in the distribution = (profit+loss) ÷ distribution difference", solve the quantitative relationship:?

(1) How many children are there? (11+1) ÷ (4-3) =12 (person)?

(2) How many apples are there? 3×12+11= 47 (pieces)