In a survey of 200 ladies, it was found that 142 like coffee, while 58 dislike it. Find the probability that a lady choose at random likes coffee.
Given, total number of ladies = 200
∴ Total number of trails = 200
Let E be the event of getting a lady who likes coffee.
∴Number of trials in which E happened = 142
Hence, the required probability is 0.71.