Question

В коллекции Кати лазерные диски и кассеты - всего 54 штуки. Количество лазерных дисков и количество кассет относятся к 2:7. Сколько у Кати лазерных дисков и сколько кассет. Спасибо.

Answer 1

Всего 54 штуки
отношение 2:7 значит всего 9 частей
1 часть равна
54/9=6
тогда лазерных дисков
6*2=12 штук
а кассет
6*7=42 штуки
ответ 12 и 42 штук

Answer 2

Calculating the Number of Laser Discs and Cassettes

To calculate the number of laser discs and cassettes in Kati's collection, we can use the given ratio of 2:7 and the total count of 54 items.

Step 1: Set up the Ratio Equation

Let's represent the number of laser discs as "2x" and the number of cassettes as "7x", where "x" is a constant.

Step 2: Use the Total Count

The total count of items is 54, so we can set up the equation: 2x + 7x = 54

Step 3: Solve for x

Combining like terms: 9x = 54 x = 6

Step 4: Calculate the Number of Laser Discs and Cassettes

Now that we have the value of x, we can calculate the number of laser discs and cassettes: - Number of laser discs = 2x = 2 * 6 = 12 - Number of cassettes = 7x = 7 * 6 = 42

Therefore, Kati has 12 laser discs and 42 cassettes in her collection.