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Ярослав3464
Ярослав3464
28.10.2022 13:13 •  Математика

Два станка производят однотипные детали. Первый допускает 10% брака , а II-20%. От каждого станка отобрали по две детали. Найти вероятности следующих событий: А –хотя бы она стандартна; В – две детали бракованные; С - три детали с дефектом.

👇
Ответ:
Слон145
Слон145
28.10.2022

із атвєт ізі бали в єблєт

4,4(88 оценок)
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Ответ:
tseng7788
tseng7788
28.10.2022

Пошаговое объяснение:

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4,6(44 оценок)
Ответ:
domna0404
domna0404
28.10.2022

В решении.

Пошаговое объяснение:

Расстояние по трассе между двумя посёлками 1540 м. Из этих посёлков одновременно навстречу друг другу выехали два велосипедиста. Скорость первого равна 3 м/с, скорость второго 4 м/с. Какое расстояние будет между велосипедистами через 3 мин после начала движения? Через какое время после начала движения велосипедисты встретятся?

Формула движения: S=v*t

S - расстояние            v - скорость             t – время

3 минуты=60*3=180 секунд.

1)Найти расстояние 1 велосипедиста:

3*180=540 (м).

2)Найти расстояние 2 велосипедиста:

4*180=720 (м).

3)Какое расстояние будет между велосипедистами через 3 мин после начала движения?

1540 - (540+720)= 280 (м).

4)Через какое время после начала движения велосипедисты встретятся?

Общее расстояние 1540 м.

Общая скорость 3+4=7 (м/сек).

Общее время: 1540 : 7 = 220 (сек.)

4,5(21 оценок)
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