Refer to Table 14.7, Chapter 14.
(i) Find the probability that a student obtained less than 20% in the mathematics test.
(ii) Find the probability that a student obtained marks 60 or above.
Total number of students = 90
(i) Number of students obtained less than 20% in the mathematics test = 7
Hence,
Probability of students obtained less than 20% in mathematics test will be,
(ii) Number of students obtained marks 60 or above = 15 + 8
= 23
Hence,
Probability of students obtained marks 60 or above will be
6