Mathematics, 24.06.2019 03:00 StupidFatChipmunk

10. sebuah kotak mengandungi 90 keping kad yang terdiridaripada kad merah dan kad biru. sekeping kad dipilihsecara rawak daripada kotak itu. kebarangkalian memilihsekeping kad merah ialah . berapakah bilangan kadmerah yang perlu ditambah ke dalam kotak itu supayakebarangkalian memilih sekeping kad merah menjadi 2/3

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10. sebuah kotak mengandungi 90 keping kad yang terdiridaripada kad merah dan kad biru. sekeping kad...