Предмет: Математика, автор: kirillsedov777

В команде пяти игрокам по 13 лет, двум игрокам по 12 лет и одному игроку 10 лет. Найдите средний возраст игрока команды.

Ответы

Автор ответа: Санечка69
1

В данной задаче средний возраст можно рассматривать как среднее арифметическое.

Среднее арифметическое - это частное от деления суммы чисел и их количества.

Поэтому:

1) 5 · 13 + 2 · 12 + 10 = 65 + 24 + 10 = 99 - сумма лет игроков;

2) 5 + 2 + 1 = 8 (игр.) - всего;

3) 99 : 8 = 12,375 (лет) - средний возраст игрока.

(Или 12, 375 = 12 целых 3/8 лет)

Ответ: 12,375 лет.

Похожие вопросы
Предмет: Английский язык, автор: ann13t14p

Лексико-грамматическое задание

Часть 1

Раскройте скобки, поставив глагол в нужную видовременную форму.

1. We are not sure if our clients (agree)_________________to such high prices next year.

2. Kelly was very nervous, because she never (take) _________________examinations before.

3. We came to the airport and then our luggage (check) ____________by the customs officer.

4. My friend left for Australia two years ago and I (not see)_____________him since then.

5. As soon as he (come)___________________, we'll be able to speak to him.

6. My uncle (ell off the ladder while he (paint) __________the ceiling.

7. We wondered where he (stay) ________________________in London next time.

S. They will cancel the trip if there (be) ______________thick fog.

9. I am very busy at the moment. I (prepare) _______________ dinner for my children.

10. Winter is usually warm here and it (not snow) often.

Часть 2

Обведите правильный вариант ответа кружком.

1.____________a modern kitchen and a well-equipped bath room in their flat.

a) It is b) There is c) There are d) There were

2. The policeman showed me several photos, but 1 didn't recognise _________

a) somebody b) nobody c) anybody d) some

3. How much__________ _____to fly to New York?

a) costs b) it costs c) docs cost d) docs it cost

4. The weather today is______ yesterday.

a) worse than b) more bad than

c) worst than d) worse

5. He had no money at that time, ________?

a) did he b) had he c) hadn't he d) isn't it

6. Our house is smaller than _____________.

a) their b) theirs c) them d) your

7. Your watch ________. ________five minutes slow.

a) are b) have c) is d)were

8. __________________late, we must hurry.

a) There is b) That is c) It was d) It is

9. It's a good party. Everybody _____________ it.

a) is enjoying b) enjoying

c) are enjoying d) have enjoyed

10. ____________ something wrong with the car.

a) It is b) This is c) There is d) There be