Предмет: Математика, автор: elina1112

В конкурсе студенческих работ участвуют 40 человек. Из них 15 человек обучается по направлению «Экономика», 10 человек – по направлению «Информатика», остальные – по направлению «Менеджмент». Порядок, в котором студенты представляют свои проекты, определяется жребием. Найдите вероятность того, что первым представлять проект будет студент, обучающийся по направлению «Менеджмент». Результат округлите до сотых.

Ответы

Автор ответа: monkeyme

2

Общее количество участвующих - 40 человек

"Экономика" - 15 человек

"Информатика" - 10 человек

"Менеджмент" = 40 - 15 - 10 = 15 человек

Вероятность = 15/40 = 0,375 = 0,38 (т.е. количество человек в "Менеджменте" делим на общее количество)

elina1112: но там варианты ответов еще

elina1112: 0.38

elina1112: 0.25 0.63 0.6

monkeyme: Ну там 5 на конце, тут округление трудно. Во всяком случае решено верно, 0,38

elina1112: я тоже так подумала ...спасибо!!!!

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Christmas Tree Memories
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Once he had made his choice, he took out an axe to cut down the tree. I wanted to help my dad and brothers, but they always told me to stand back. When the cutting began, I tried to hold the tree up. I was afraid the tree would fall on them and I felt strong enough to hold it. After the tree was down we took it to the car and went back home.
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The last few years we lived in that house the trips to the forest with dad ceased. We bought an artificial tree instead.

А7. Ted’s family had a tradition of decorating the Christmas tree together.
1) True
2) False
3) Not stated

А8. When Ted’s father went to choose their Christmas tree, Ted stayed at home.
1) True
2) False
3) Not stated

А9. Ted’s family lived in a small town.
1) True
2) False
3) Not stated

А10. Ted’s father always chose a tall tree for Christmas.
1) True
2) False
3) Not stated

А 11. Ted’s mother preferred the Christmas decorations created by her children.
1) True
2) False
3) Not stated

А12. A lighted angel was Ted’s favourite Christmas decoration.
1) True
2) False
3) Not stated

А13. There was a star on the top of the Christmas tree in Ted’s house.
1) True
2) False
3) Not stated

А 14. Finally the family stopped having a live Christmas tree.
1) True
2) False
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