Предмет: Математика, автор: qazdrfvhujmlp61

Среднее арифметическое 9 различных натуральных чисел равно и
19. Среднее арифметическое этих чисел и десятого числа равно 20.
Чему равно десятое число?​

Ответы

Автор ответа: IrkaShevko
10

Ответ:

29

Пошаговое объяснение:

сумма девяти чисел равна 9 * 19 = 171

сумма десяти чисел равна 10 * 20 = 200

десятое число: 200 - 171 = 29

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