Q. 64.5( 181 Votes )

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.

Answer :

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



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