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Среднее арифметическое 5 чисел 40,а среднее арифметическое других чисел 32.Найдите среднее арифметическое этих восьми чисел
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Предмет:
Математика -
Автор:
roxiehw9a - 6 лет назад
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Ответы 2
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(5*40+3*32):8=(200+96):8=296:8=37Ответ: 37
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Автор:
adriel - 6 лет назад
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среднее число из 5 чисел: 5×40=200ср. число из 3 чисел: 3×32=96сумма восьми чисел: 200+96=296ср арифм 8 чисел: 296÷8=37
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Автор:
laureanoday - 6 лет назад
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1.Adding colours
2.A craftsman’s present
3.The main tree of the country
4.The legend of the Christmas tree
5.Technical progress
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7.An order to celebrate
8.Decorating from top to bottom
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In the 18th century, people started decorating Christmas trees with candles. Later, with the discovery of electricity, electric lights were put on Christmas trees. It was Edward Johnson, an assistant of Thomas Edison, who first used electric lights for Christmas tree decoration. People liked his idea. However, it took several years before the electric lights became available to the general public.
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