Дано 6 белых шаров и 3 чёрных шара . Сколько разных способов их можно поставить ...

krstnaa @krstnaa

November 2021 1 10 Report

Дано 6 белых шаров и 3 чёрных шара . Сколько разных способов их можно поставить в очередь?

Answers & Comments

Cararious

Ответ:

Объяснение:

если бы шары не отличались по цвету, было бы 9!

т.к. от перестановки местами одинаковых шаров число способов не увеличится, надо поделить на перестановки белых шаров (6!) и перестановки чёрных шаров (3!)

итого 9!/(6!×3!)=84

2 votes Thanks 1

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Put the verb in brackets into Past Simple or Past Continuous. 1. She _______(take) a shower when the telephone _ (ring). 2.

choose can cant may must mustnt dont have to should 1 i play the guitar but i sing 2

put the verb in brackets into the appropriate form expressing future future simple present continuous going to present simple 1 im thirsty hold

put the verb in brackets into present simple or present continuous 1 my family live in a small flat but well buy

prichiny razmyva beregov morya i poyasnenie

skolko grammov 60 uksusnoj kisloty mozhno poluchit iz 82 g acetata natriya vzai

srochnooorasschitajte massovuyu dolyu karbonata natriya v rastvore v 500 ml vody ra

pochemu u odnih ptic raznocvetnye yajcaa u drugih yajca belye

raznica i obshee mezhdu aistom i popugaem pomogite pzh

pomogite pervaya palochka na 1 sm dlinneechem vtoraya palochka tretya palochka na 4

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Put the verb in brackets into Past Simple or Past Continuous. 1. She ___________________(take) a shower when the telephone _____________ (ring). 2.

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