Предмет: Алгебра, автор: Anya00

1)из коробки, в которой хранятся 5 черных и 7 белых шаров, достотют один шар. Какова вероятность того, что этот шар окажется: а)черным;б)белым.

 

2) ученик задумал жвузначное число. какова вероятность, что оно является квадратом некоторого числа?

Ответы

Автор ответа: Ahmabed
0

1)

5:12*100%=42%

7:12*100%=58%

 

2)

6:90*100%=6.(6)

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