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