Question

Куча для участников математической олимпиады купили призы энциклопедия на сумму 3000 руб. диски хочу все знать на сумму 7200 руб. стоит 500 руб. диск 30 руб Сколько всего купили призов

Answer 1

Как я поняла, энциклопедия стоит 500 руб. / шт. 
Диск 30 руб./ шт.
Тогда: 
3000 / 500 = 6 - энциклопедий
7200 / 30 = 240 - дисков
240+6 = 246 призов всего.
Ответ: 240

Answer 2

Calculation of the Total Cost of Prizes

To calculate the total cost of the prizes, we need to consider the cost of the encyclopedia and the cost of the disks.

The encyclopedia was purchased for 3000 rubles

Each disk costs 30 rubles, and the total cost of all the disks is 7200 rubles

To find the number of disks purchased, we can divide the total cost of the disks by the cost of each disk:

7200 rubles / 30 rubles = 240 disks.

Therefore, the total number of prizes purchased is the sum of the encyclopedia and the disks:

3000 rubles (encyclopedia) + 7200 rubles (disks) = 10200 rubles.

So, a total of 10200 rubles was spent on purchasing the prizes for the participants of the mathematical olympiad.