Answer: C.

Explanation:
Given: The results of tossing a number cube 9 times are:
4, 3, 6, 6, 2, 5, 3, 5, 1
Then , the number of times get odd number (3,5,3,5,1): 5
Now, the experimental probability of tossing an odd number will be :

Hence, the experimental probability of tossing an odd number
