Qutida 5 ta qizil, 4 ta koโk va 3 ta yashil shar bor. Qutidan tasodifiy ravishda ketma-ket 2 ta shar olinadi (qaytarib solinmaydi). Ikkala sharning ham bir xil rangda boโlish ehtimolini toping.
Soโrovnoma
- A) 19/66
- B) 13/66
- C) 23/66
- D) 17/66