Question

7. The percentage of marks obtained by a student in examination
are given below:
II
IV
V
Examination Subjects
Marks ( in % )
I
58
64
76
62
85
Find the probability that the student gets:
(i) a first class in a subject i.e., at least 60% marks
(ii) a distinction in a subject i.e., 75% or above
(iii) marks between 70% and 80% in a subject​

Answer 1

Answer:

Total no. of unit tests =5

Number of tests in which the student scored more than 70% marks =3

Therefore,

Probability that a student gets more than 70% marks =

Total no. of tests

No. of tests in which the student scored more than 70% marks

=

5

3

=0.6