Question

На 100 руб. Коля купил не только 7 тетрадей по цене 3 руб. 50 коп. но и 5 альбомов Сколько стоит 1 альбом

Answer 1

1)3 руб. 50 коп. * 7 =24 руб.  50 коп.-денег на тетради
2)100 руб. - 24 руб. 50 коп. = 75 руб. 50 коп.
3)75 руб. 50 коп. : 5 =15 руб.
Ответ: 15 рублей стоит один альбом.

Answer 2

Calculating the Cost of an Album

To calculate the cost of 1 album, we can use the information provided.

Kolya bought 7 notebooks at a price of 3 rubles and 50 kopecks each, and 5 albums. We need to find the cost of 1 album.

Let's calculate the total amount spent on notebooks and albums first.

Cost of 7 notebooks: 7 notebooks * 3 rubles 50 kopecks = 24 rubles 50 kopecks

Total amount spent on notebooks: 24 rubles 50 kopecks

Now, we need to find the total amount spent on all the items and then calculate the cost of 1 album.

Total amount spent on all items: 100 rubles

Cost of 5 albums: Total amount spent - Cost of notebooks 100 rubles - 24 rubles 50 kopecks = 75 rubles 50 kopecks

Cost of 1 album: Total cost of albums / Number of albums 75 rubles 50 kopecks / 5 albums = 15 rubles 10 kopecks

So, the cost of 1 album is 15 rubles 10 kopecks.