Hi I attched the solution as an attachment. Hope this helps you.
Binomial with n = 6 and
p = 0.167000
Populate this table
P(X = x)
26. Find the probability that at most two subjects experience headaches. Is it unusual to have at most two of six subjects experience headaches?
P= (insert calculations) = ___________
Conclusion: Now you'll provide an interpretation and a summary statement