一道GMAT数学DS题
Eachofthe25ballsinacertainboxiseitherred,blueorwhiteandhasanumberfrom1to10paintedonit.Ifoneballistobeselectedatrandomfromthebox,whatistheprobabilitythattheballselectedwilleitherbewhiteorhaveanevennumberpaintedonit?
1)x09Theprobabilitythattheballwillbothbewhiteandhaveanevennumberpaintedonitis0.
2)x09Theprobabilitythattheballwillbewhiteminustheprobabilitythattheballwillhaveanevennumberpaintedonitis0.2.
求知问题翻译跟答案解析.
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