Question

Sonia rolls a six-sided number cube 12 times and records if she rolls a 2. What is the number of trials for this binomial experiment?

A.2
B.6
C.12
D.18

Answer 1

C. 12

Sonia rolls it 12 times, so there's 12 trials.

Answer 2

In the binomial experiment, the number of times the six-sided cube was rolled is the number of trials. Thus the number of trials for this binomial experiment is 12. The formular for a binomial experiment is nCx (p)^x (q)^(n - x) where: n is the number of trials, x is the success event, p is the probability of success, q is the probability of failure.