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atopio
atopio
13.07.2022 16:40 •  Математика

В конструкторе 90 деталей. Миша построил из 56 деталей здание школы, а из остальных деталей два одинаковых дома. Сколько деталей ушло на один дом?
17 дет.
22 дет.
44 дет.
34 дет.

👇
Ответ:
nasta086
nasta086
13.07.2022

ответ: 17дет

Пошаговое объяснение:

4,8(22 оценок)
Ответ:
ketmeow
ketmeow
13.07.2022

ответ: 1) 90-56=34 2) 34-17=17 (семьдадцот деталей на постройку одного дома. ответ: 17 деталей на постройку одного дома..

Пошаговое объяснение:

4,8(41 оценок)
Открыть все ответы
Ответ:
ROMMIT2
ROMMIT2
13.07.2022

Пошаговое объяснение:

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4,4(68 оценок)
Ответ:
zhannursadykbek
zhannursadykbek
13.07.2022

Запишем формулу: P=m/n, где m – число исходов, благоприятствующих осуществлению события X, а n – число всех равновозможных элементарных исходов.

Для начала определим вероятность выпадения орла или решки при одном броске. Выпадает всегда 1 результат, а всего исходов 2. Значит, вероятность выпадения орла или решки = 1/2. Но бросков мы делаем 2, а значит, количество исходов возводится в квадрат и теперь равно 1 / 2 × 2 = 1/4. В последующем мы будем домножать числитель на количество удовлетворяющих нас исходов.

Значение "Решка выпала хотя бы 1 раз" верно при следующих результатах:

1) решка и орёл

2) орёл и решка

3) решка и решка

Как видим, количество удовлетворяющих нас результатов =3, а значит, в двух бросках решка выпадает хотя бы один раз с вероятностью 1 × 3 / 4 = 3/4 = 0.75 = 75%

В первый раз выпал орёл при следующих результатах:

1) орёл и решка

2) орёл и орёл

Как видим, количество удовлетворяющих нас результатов =2, а значит, в двух бросках орёл выпадет первым с вероятностью 1 × 2 / 4 = 2/4 = 1/2 = 0.5 = 50%

ответ: 75%, 50%.

4,7(36 оценок)
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