Question

3 человека в классе выполнили все 4 задания контрольной роботы,8 человек выполнили 3 задания,10 человек 2 задания ,4 человека одно задание и 5 человек не выполнили не одного задания.определите среднее число заданий,выполненых одним ученеком помогите плиз решить задачу заранее спасиибо

Answer 1

Чтобы найти среднее число нужно сложить все числа и разделить на их колличество
4+3+2+1+0=10
10:5=2

Answer 2

Problem Analysis

We are given the following information: - 3 people completed all 4 tasks of a test. - 8 people completed 3 tasks. - 10 people completed 2 tasks. - 4 people completed 1 task. - 5 people did not complete any tasks.

We need to determine the average number of tasks completed by each student.

Solution

To find the average number of tasks completed by each student, we need to calculate the total number of tasks completed and divide it by the total number of students.

Let's calculate the total number of tasks completed: - 3 people completed all 4 tasks, so they completed 3 * 4 = 12 tasks. - 8 people completed 3 tasks each, so they completed 8 * 3 = 24 tasks. - 10 people completed 2 tasks each, so they completed 10 * 2 = 20 tasks. - 4 people completed 1 task each, so they completed 4 * 1 = 4 tasks.

The total number of tasks completed is 12 + 24 + 20 + 4 = 60.

Now, let's calculate the total number of students: - 3 people completed all 4 tasks. - 8 people completed 3 tasks. - 10 people completed 2 tasks. - 4 people completed 1 task. - 5 people did not complete any tasks.

The total number of students is 3 + 8 + 10 + 4 + 5 = 30.

To find the average number of tasks completed by each student, we divide the total number of tasks completed by the total number of students: Average = Total tasks completed / Total students = 60 / 30 = 2.

Therefore, the average number of tasks completed by each student is 2.

Answer

The average number of tasks completed by each student is 2.