Question

У Коли в коллекции 500 иностранных и российских марок.Иностраных марок -45% своей коллекции.Из них 20% марок-немецкие.Сколько немецких марок в коллекции у Коли?

Answer 1

500 - 100%
х  -45%
1)100х=22500
х=225 иностранных марок
2)225 - 100%
х  - 20%
100Х=4500
х=45 немецких

Answer 2

Calculating the Number of German Stamps in Kolya's Collection

To calculate the number of German stamps in Kolya's collection, we can follow these steps:

1. Calculate the Total Number of Foreign Stamps in the Collection: - Kolya's collection consists of 500 foreign and Russian stamps. - 45% of the collection is foreign stamps.

The total number of foreign stamps in Kolya's collection can be calculated as follows: ``` Total Foreign Stamps = 45% of 500 = 0.45 * 500 = 225 ```

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2. Calculate the Number of German Stamps: - 20% of the foreign stamps in Kolya's collection are German.

The number of German stamps in Kolya's collection can be calculated as follows: ``` Number of German Stamps = 20% of Total Foreign Stamps = 0.20 * 225 = 45 ```

Therefore, there are 45 German stamps in Kolya's collection.

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