Question

у всех 25 учеников на собрание пришли мамы и папы, 20 мам и 12 пап у скольких учеников на собрание пришли и мамы и папы?две девочки и 3 мальчика вместе съели 16 порций мороженного, каждый мальчик съел в 2 раза больше,чем каждая девочка. сколько порций съедят 3 девочки и 2 мальчика с таки же аппетитом.

Answer 1

У 7 учеников на собрание пришли и мамы и папы

Answer 2

2 девочки сьели по 2 мороженного,а 3 мальчика сьели по 4 мороженного,
если 3 девочки по 2 мороженного то это получается 6 штук и 2 мальчика по 4 мороженного 8 штук 6+8=14 мороженного сьедят с таким же аппетитом

Answer 3

Task 1: Number of parents at the meeting

To determine the number of students whose parents attended the meeting, we need to find the intersection of the number of mothers and fathers who attended the meeting.

According to the information provided, 20 mothers and 12 fathers attended the meeting. To find the number of students whose parents attended the meeting, we need to find the intersection of these two sets.

The number of students whose parents attended the meeting is the smaller of the two numbers, which is 12.

Answer: 12 students had both their mothers and fathers at the meeting.

Task 2: Ice cream portions

Let's calculate the number of ice cream portions eaten by 3 girls and 2 boys with the same appetite.

According to the information provided, 2 girls and 3 boys together ate 16 portions of ice cream. Each boy ate twice as much as each girl.

Let's assume that each girl ate x portions of ice cream. Then each boy ate 2x portions.

The total number of portions eaten by the girls is 2x * 3 = 6x. The total number of portions eaten by the boys is 3 * 2x = 6x.

So, the total number of portions eaten by both the girls and the boys is 6x + 6x = 12x.

Since the total number of portions eaten is 16, we can set up the equation:

12x = 16

To find x, we can divide both sides of the equation by 12:

x = 16 / 12 = 4 / 3

Therefore, each girl ate 4/3 portions of ice cream, and each boy ate 2 * (4/3) = 8/3 portions of ice cream.

Now, let's calculate the number of portions eaten by 3 girls and 2 boys with the same appetite:

3 * (4/3) + 2 * (8/3) = 4 + 16/3 = 12/3 + 16/3 = 28/3

So, 3 girls and 2 boys with the same appetite will eat 28/3 portions of ice cream.

Note: The answer is given in fractions because the number of portions may not be a whole number.