Question

В одной деревне в Армении каждый житель говорит либо по-армянски, либо по-русски, либо на обоих языках. 90% жителей говорят по-армянски, 70% - по-русски. Сколько процентов всего населения деревни говорят на обоих языках ?

Answer 1

Пусть количество жителей деревни =1000
1)1000-1000*0,9=100-жителей не говорят по армянски
2)1000-1000*0,7=300-жителей не говорят по русски
3)1000-300-100=600-жителей говорят на обоих языках
600=60%
Ответ:60% жителей говорят на обоих языках

Answer 2

Calculation of the Percentage of the Population Speaking Both Armenian and Russian in the Village

To calculate the percentage of the population in the village that speaks both Armenian and Russian, we can use the information provided. According to the given data:

- 90% of the population speaks Armenian. - 70% of the population speaks Russian.

We need to determine the percentage of the population that speaks both languages.

To do this, we can use the concept of set intersection. The percentage of the population that speaks both languages can be calculated by finding the intersection of the two language-speaking populations and dividing it by the total population.

Let's calculate it step by step:

1. Calculate the population that speaks both Armenian and Russian: - 70% of the population speaks Russian. - Therefore, 70% of the population speaks at least one language (Russian). - 90% of the population speaks Armenian. - Therefore, 90% of the population speaks at least one language (Armenian). - The population that speaks both languages can be calculated by subtracting the percentage of the population that speaks at least one language (Russian or Armenian) from 100%: - Population that speaks both languages = 100% - (70% + 90%) - Population that speaks both languages = 100% - 160% - Population that speaks both languages = -60%

2. Interpretation of the result: - The calculated percentage of the population that speaks both Armenian and Russian is -60%. - However, it is not possible for the percentage to be negative. - This suggests that there might be an error or inconsistency in the given data.

Based on the information provided, it is not possible to determine the exact percentage of the population in the village that speaks both Armenian and Russian. Further clarification or additional information is needed to accurately calculate this percentage.

Please provide any additional information or clarification if available, and I'll be happy to assist you further.