To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table.

 

Opinion	Number of students
like	135
dislike	65

Find the probability that a student chosen at random
(i) likes statistics, (ii) does not like it.

Solution:

Total number of students = 135+65 = 200

(i) Number of students who like statistics = 135

, the probability that a student likes statistics = 135/200 = 27/40

(ii) Number of students who do not like statistics = 65

∴, the probability that a student does not like statistics = 65/200 = 13/40