Answer:
12
Step-by-step explanation:
Binomial expression: [tex]P(X=r) =^nC_r p^r q^{n-r}[/tex]
Where n = No. of trials i.e. no. of times experiment occur
p= Probability of success
q= Probability of Failure
r= No. of success.
We are given that Sonia rolls a six sided number cube 12 times and records of she rolls a 2.
Since here the cube was rolled 12 times.
Thus n =12
So, No. of trials =12
Hence the number of trials for this binomial experiment is 12.