Question

среднее арифметическое 6-ти чисел равно10,а среднее арифметическое 4-ёх чисел равно 20-ти Найдите среднее арифметическое 10-ти чисел​

Answer 1

Ответ:

Убранное число 29  

Сумма 10 чисел = 20*10 = 200  

Сумма 9 чисел = 19*9 = 171  

200 - 171 = 29

Пошаговое объяснение:

Answer 2

To find the average of 10 numbers, we can use the following formula:

Average = Sum of Numbers / Number of Numbers

Let's denote the 10 numbers as a1, a2, ..., a10.

We know that:

1. The average of 6 numbers is 10.
2. The average of 4 numbers is 20.

Using this information, we can set up two equations:

1. (a1 + a2 + a3 + a4 + a5 + a6) / 6 = 10
2. (a1 + a2 + a3 + a4) / 4 = 20

Now, let's solve these equations:

1. (a1 + a2 + a3 + a4 + a5 + a6) = 6 * 10 a1 + a2 + a3 + a4 + a5 + a6 = 60

2. (a1 + a2 + a3 + a4) = 4 * 20 a1 + a2 + a3 + a4 = 80

Now, let's find the sum of all 10 numbers:

Sum of 10 numbers = (a1 + a2 + a3 + a4 + a5 + a6) + (a1 + a2 + a3 + a4) = 60 + 80 = 140

Finally, we can find the average of the 10 numbers:

Average of 10 numbers = Sum of 10 numbers / 10 = 140 / 10 = 14

Therefore, the average of the 10 numbers is 14.