The probabilities were obtained by entering the values of n = 6 and p = 0

The probabilities were obtained by entering the values of n = 6 and p = 0.167. In a clinical test of the drug lipitor, 16.7% of the subjects treated with 10mg experienced headaches. In each case, assume that 6 subjects are randomly selected and treated with 10 mg of atorvastatin, then find the indicated probability.

Binomial with n = 6 and p = 0.167000

X P(X = x)
0.00 0.3341
1.00 0.4019
2.00 0.2014
3.00 0.0538
4.00 0.0081
5.00 0.0006
6.00 0.0000

26. Find the probability that at most two subjects experience headaches. Is it unusual to have at most two of six subjects experience headaches?