12. A box contains 6 distinct dolls. From the box, 3 dollsare randomly

1.	12. A box contains 6 distinct dolls. From the box, 3 dollsare randomly selected one by one with replacementWhat is the probability of selecting 3 distinct dolls?\begin{array}{ll}{\text { (a) } \frac{5}{54}} & {\text { (b) } \frac{12}{25}} \\ {\text { (c) } \frac{1}{20}} & {\text { (d) } \frac{5}{9}}\end{array}
Answer» 6C3/(666)=20/216=(5×4)/(54×4)=5/54 answer in book is 5/9

12. A box contains 6 distinct dolls. From the box, 3 dollsare randomly selected one by one with replacementWhat is the probability of selecting 3 distinct dolls?\begin{array}{ll}{\text { (a) } \frac{5}{54}} & {\text { (b) } \frac{12}{25}} \\ {\text { (c) } \frac{1}{20}} & {\text { (d) } \frac{5}{9}}\end{array}

Answer»

6C3/(6*6*6)=20/216=(5×4)/(54×4)=5/54

answer in book is 5/9