Предмет: Математика, автор: кукушк

Вычислите количество перестановок букв в слове КНИГА

Ответы

Автор ответа: NNNLLL54
16
Так как все буквы разные и их всего 5 штук, то количество перестановок

P=5!=1\cdot 2\cdot 3\cdot 4\cdot 5=120

кукушк: почему у меня получилось 12000?? что я не так посчитала??
NNNLLL54: Подсчитайте заново...Я вам написала, как считать...
кукушк: да,это у меня калькулятор затупил! Спасибо огромное))))
NNNLLL54: 2*3=6 , 4*5=20 , 6*20=120
кукушк: Сколькими способами можно выбрать 6 игроков из 8 кандидатур? у меня ответ получился 56..
кукушк: опять что то не правильно
NNNLLL54: Это число сочетаний из 8 по 6 = (8*7)/2 =28
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It's the 21 st of October, 10 o'clock in the morning. Mr. Blake has come to the Russian Trade Delegation.

Blake: Good morning! My name's Blake. I'm from Blake and Co. I've got an appointment with Mr. Voronin at 10.15.

Receptionist: Good morning, Mr. Blake. Mr. Voronin is expecting you. Will you take a seat, please? Blake: Thank you. I'm a bit early, actually. Receptionist: That's all right, Mr. Blake.

(In a few minutes Voronin comes downstairs to meet ' him).

Voronin: Oh, Mr. Blake, it's nice to see you here. How are you? Blake: Fine, thanks! And you? Voronin: Pretty well too, thank you. This way, please.

(They come into the conference room and take their seats at the table.)

Voronin: Would you like a cup of coffee? Blake: Yes, please. It's very cold and wet outside today. Voronin: Yes, the weather hasn't been very good lately. Blake: That's right, but it's usually warm here in October. Now,

Mr. Voronin, how about our quotation and catalogues? Have you looked through them?

Voronin: Sure! We've studied them closely. The new model is certainly good. Blake: Yes, it's of high quality. We've just starting producing the model and we've already received a lot of orders.

Voronin: Your machines meet our requirements and we are interested in buying them. Mr. Blake, have you seen our contract form? Blake: Not yet.

Voronin: Would you like to look through it?

Blake: I certainly would.

Voronin: Here you are Mr. Blake. Please study our terms and let's meet again next on Tuesday. Blake: All right, Mr. Voronin. Good-bye for now.