Предмет: Математика, автор: nagitohope414

6. Сумма четырех чисел равно 20,7 , а среднее
арифметическое шести других чисел - 17,9. Найдите
среднее арифметическое всех этих чисел..​

Ответы

Автор ответа: pushpull
0

Ответ:

Пошаговое объяснение:

среднее арифметическое 4 чисел равно 20,7/4= 5,175

среднее арифметическое 10 чисел (5,175+17,9)/2=12,4375

Автор ответа: nlemur
0

Ответ: 12,81

Пошаговое объяснение: 17,9 * 6 = 107,4

107,4 + 20,7= 128,1

128,1 : 10 = 12,81

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