Предмет: Математика, автор: Kriss2908

Среднее арифметическое трёх чисел 7,6, а сумма других четырёх чисел 12,69. Найди среднее арифметическое всех этих семи чисел

Kriss2908: Среднее арифметическое трёх чисел 7,6, а сумма других четырёх чисел 12,69. Найди среднее арифметическое всех этих семи чисел

Ответы

Автор ответа: ТатМих

7.6 * 3=22.8 -сумма первых трёх чисел
22.8 + 12.69 =35.49 -сумма всех семи чисел
35.49 : 7=5.07 -среднее арифметическое всех семи чисел

Ответ : 5.07.

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