[填空题]
Adam has an unbiased octahedral (l62e3 b7:b8a +1didju dvt bbfeight facedvi-dy00 feh *n) die which has the numbers 1,2,3,4,5,6,7,8f0 d*0vih- eny .
Bella has an unbiased pentahedral (five faced) die which has the numbers 1,3,5,7,9 .
1. Complete the Venn diagram with the numbers written on Adam's die (A) and Bella's die (B) .
2. Find $n\left(A^{\prime} \cup B^{\prime}\right)$ .
Adam and Bella are each going to roll their die once only. Charlie says the probability that each die will show the same number is $\frac{1}{10}$ .
3. Determine whether Charlie is correct. Give a reason.
