kaidah pencacahan
9 jenis larutan
• 4 jenis larutan A
• 5 jenis B
dipilih 3 larutan secara acak
banyak cara mengambil lebih dari satu jenis larutan A
= AAB + AAA
= 4C2 × 5C1 + 4C3
= 4!/(2!2!) × 5!/(1!4!) + 4!/(3!1!)
= 6 × 5 + 4
= 34 cara
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Verified answer
kaidah pencacahan
9 jenis larutan
• 4 jenis larutan A
• 5 jenis B
dipilih 3 larutan secara acak
banyak cara mengambil lebih dari satu jenis larutan A
= AAB + AAA
= 4C2 × 5C1 + 4C3
= 4!/(2!2!) × 5!/(1!4!) + 4!/(3!1!)
= 6 × 5 + 4
= 34 cara