Question

In a group of 100 people at a restaurant, 36 ordered a cola with lunch, 23 ordered the special for the day, and 12 ordered both. Find the probability that a person picked from this group at random ordered either a cola or the special? Express your answer in decimal form.

Answer 1

For coca cola=.48
For special=.35

Answer 2

probability=possible no. of outcomes/total no. of outcomes

so,

P = probability is 1 because all get cola