Question

Среди учеников города с. 20%не учит математике, а среди тех кто учит математику 55%её не понимают. Среди учиников, понимающих математику, всего 15%ходит на олимпиады по матем. А среди учеников посещающих олимпиады по матем. Её любит каждый третий. Какой процент учеников города с любит математику? ПЖ олимпиада по математике 9 класс ​

Answer 1

Відповідь:

1,8% учеников города с любит математику.

Покрокове пояснення:

Среди учеников города 20% не учат математику, значит 100% - 20% = 80% ее учат.

Среди тех кто учит математику 55% её не понимают, значит 100% - 55% = 45% понимают математику, а это 80% * 45% = 36% от всех учеников города.

Среди учеников, понимающих математику, всего 15% ходит на олимпиады по математике, а это 36% * 15% = 5,4% от всех учеников города.

А среди учеников посещающих олимпиады по математике её любит каждый третий, а это 5,4% / 3 = 1,8% от всех учеников города.

1,8% учеников города с любит математику.

Answer 2

Problem Analysis

To find the percentage of students in the city who love mathematics, we need to analyze the given information step by step. Let's break it down:

1. Among all the students in the city, 20% do not study mathematics. 2. Among the students who study mathematics, 55% do not understand it. 3. Among the students who understand mathematics, only 15% participate in mathematics olympiads. 4. Among the students who participate in mathematics olympiads, every third student loves mathematics.

We need to determine the percentage of students in the city who love mathematics.

Solution

Let's solve this problem step by step:

Step 1: Find the percentage of students who study mathematics. - Since 20% of the students do not study mathematics, the percentage of students who study mathematics is 100% - 20% = 80%.

Step 2: Find the percentage of students who understand mathematics. - Among the students who study mathematics, 55% do not understand it. Therefore, the percentage of students who understand mathematics is 100% - 55% = 45%.

Step 3: Find the percentage of students who participate in mathematics olympiads. - Among the students who understand mathematics, only 15% participate in mathematics olympiads. Therefore, the percentage of students who participate in mathematics olympiads is 45% * 15% = 6.75%.

Step 4: Find the percentage of students who love mathematics. - Among the students who participate in mathematics olympiads, every third student loves mathematics. Therefore, the percentage of students who love mathematics is 6.75% / 3 = 2.25%.

Therefore, the percentage of students in the city who love mathematics is 2.25%.

Conclusion

Based on the given information, we have determined that approximately 2.25% of the students in the city love mathematics.

Please note that the above calculations are based on the information provided and may not represent the actual percentages in a real-world scenario.