Question

В олимпиаде по программированию участвовали 52 человека. Каждый участник умел писать программы на языке Паскаль, или Питон или и том, и другом. Половина участников владела языком Паскаль, 20 — обоими языками. Сколько участников владела языком Питон?

Answer 1

Объяснение:

52/2=26-влалеют только паскалем

52-26=26-владеют питоном

6-владеют Только питоном

Answer 2

Problem Analysis

We are given that 52 participants took part in a programming competition. Each participant could write programs in either Pascal, Python, or both. Half of the participants knew Pascal, and 20 participants knew both Pascal and Python. We need to determine how many participants knew Python.

Solution

Let's denote the number of participants who knew Pascal as P, the number of participants who knew Python as Y, and the number of participants who knew both languages as B.

From the given information, we can form the following equations:

1. P + Y - B = 52 (Total number of participants) 2. P = 0.5 * 52 (Half of the participants knew Pascal) 3. B = 20 (20 participants knew both Pascal and Python)

We can solve these equations to find the value of Y, which represents the number of participants who knew Python.

Calculation

Substituting the values from equations 2 and 3 into equation 1, we get:

0.5 * 52 + Y - 20 = 52

Simplifying the equation:

26 + Y - 20 = 52 Y - 20 = 52 - 26 Y - 20 = 26

Adding 20 to both sides:

Y = 26 + 20 Y = 46

Answer

Therefore, there were 46 participants who knew the Python programming language.