Предмет: Алгебра, автор: habarovandrey1

В лотерее 2000 билетов, среди которых 50 выигрышных. приобретается один билет. какова вероятность того, что этот билет а) выигрышный б)невыигрышной

Ответы

Автор ответа: zhbr1234
0
!Итак: получается 50 выйгрышные а 1950 нет!
тогда 
1)вероятность того что они не выйгрышные 502000=0,025
2)невыйгрышные 19502000=0,975
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