A probability experiment is conducted in which the sample space
of the experiment is
S={7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18},
event F={7, 8, 9, 10, 11}, and event
G={11, 12, 13, 14}. Assume that each outcome is
equally likely. List the outcomes in F or G. Find
P(F or G) by counting the number of outcomes in F or G.
Determine P(F or G) using the general addition rule.