2,7
Пошаговое объяснение:
1,5•3=4,5 вместе 3 числа.
3,6•4=14,4 вместе 4 числа.
4,5+14,4=18,9 вместе 7 чисел.
18,9:7=2,7 среднее арифметическое всех чисел.
Может возникнуть вопрос, почему я всё сложил. Вот объяснение:
Возьмём 3 числа со средним арифметическим 1,5, как в примере.
Например: 1,3 ; 2 ; 1,2 (1,2+2+1,3=4,5 ; 4,5:3=1,5) так вот пусть эти числа были даны. Это среднее арифметическое, поэтому это общее значение этих чисел , всё равно что 1,5+1,5+15=4,5 ; 4,5:3=1,5. Это одинаковые примеры с разным значением.
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